Ukraine(01 of29)
Open Image ModalAn Ukrainian serviceman from battalion \"Kiev1\" looks around in Marinka, Donetsk region, eastern Ukraine, Thursday, June 4, 2015. A major battle erupted Wednesday on the western edge of the main separatist rebel stronghold in eastern Ukraine, leaving more than a dozen dead and threatening to tip the country back into full-blown war. The Ukrainian Interior Ministry said at least one person was killed in Marinka, the government-held town where fighting was centered. (AP Photo/Evgeniy Maloletka) (credit:ASSOCIATED PRESS)
Ukraine(02 of29)
Open Image ModalA Ukrainian serviceman from battalion \"Kiev1\" sit in a military truck in Marinka, Donetsk region, eastern Ukraine, Thursday, June 4, 2015. A major battle erupted Wednesday on the western edge of the main separatist rebel stronghold in eastern Ukraine, leaving more than a dozen dead and threatening to tip the country back into full-blown war. The Ukrainian Interior Ministry said at least one person was killed in Marinka, the government-held town where fighting was centered. (AP Photo/Evgeniy Maloletka) (credit:ASSOCIATED PRESS)
Ukraine(03 of29)
Open Image ModalRussian-backed rebels guard their position near Marinka in the suburbs of Donetsk, eastern Ukraine, Thursday, June 4, 2015. Separatist and government troops in east Ukraine stood nervously poised hundreds of meters apart Thursday in the wake of bloody battle that has threatened to demolish what remains of the brittle cease-fire there. (AP Photo/Mstyslav Chernov) (credit:ASSOCIATED PRESS)
Ukraine(04 of29)
Open Image ModalA Russian-backed rebel smokes in a trench near Marinka in the suburbs of Donetsk, eastern Ukraine, Thursday, June 4, 2015. Separatist and government troops in east Ukraine stood nervously poised hundreds of meters apart Thursday in the wake of bloody battle that has threatened to demolish what remains of the brittle cease-fire there. (AP Photo/Mstyslav Chernov) (credit:ASSOCIATED PRESS)
Ukraine(05 of29)
Open Image ModalA Russian-backed rebel shows his scar from a gunshot wound while sitting in a trench near Marinka in the suburbs of Donetsk, eastern Ukraine, Thursday, June 4, 2015. Separatist and government troops in east Ukraine stood nervously poised hundreds of meters apart Thursday in the wake of bloody battle that has threatened to demolish what remains of the brittle cease-fire there. (AP Photo/Mstyslav Chernov) (credit:ASSOCIATED PRESS)
Ukraine(06 of29)
Open Image ModalUkrainian soldiers from the 25th airborne brigade ride on an APC on the outskirts of Marinka, Donetsk region, eastern Ukraine, Thursday, June 4, 2015. Ukraine\'s president on Thursday warned of a possible large-scale offensive by separatist forces in the east, one day after a major battle erupted on the western edge of the main separatist rebel stronghold. (AP Photo/Evgeniy Maloletka) (credit:ASSOCIATED PRESS)
Ukraine(07 of29)
Open Image ModalUkrainian soldiers from the 25th airborne brigade ride atop an APC in a convoy of military vehicles on the outskirts of Marinka, Donetsk region, eastern Ukraine, Thursday, June 4, 2015. Ukraine\'s president on Thursday warned of a possible large-scale offensive by separatist forces in the east, one day after a major battle erupted on the western edge of the main separatist rebel stronghold. (AP Photo/Evgeniy Maloletka) (credit:ASSOCIATED PRESS)
Ukraine(08 of29)
Open Image ModalUkrainian soldiers from the 25th airborne brigade sit atop an APC on the outskirts of Marinka, Donetsk region, eastern Ukraine, Thursday, June 4, 2015. Ukraine\'s president on Thursday warned of a possible large-scale offensive by separatist forces in the east, one day after a major battle erupted on the western edge of the main separatist rebel stronghold. (AP Photo/Evgeniy Maloletka) (credit:ASSOCIATED PRESS)
Ukraine(09 of29)
Open Image ModalA Ukrainian soldier from the 25th airborne brigade speaks on a mobile phone inside an APC on the outskirts of Marinka, Donetsk region, eastern Ukraine, Thursday, June 4, 2015. Ukraine\'s president on Thursday warned of a possible large-scale offensive by separatist forces in the east, one day after a major battle erupted on the western edge of the main separatist rebel stronghold. (AP Photo/Evgeniy Maloletka) (credit:ASSOCIATED PRESS)
Ukraine(10 of29)
Open Image ModalUkrainian soldiers from the 25th airborne brigade sit atop an APC on the outskirts of Marinka, Donetsk region, eastern Ukraine, Thursday, June 4, 2015. Ukraine\'s president on Thursday warned of a possible large-scale offensive by separatist forces in the east, one day after a major battle erupted on the western edge of the main separatist rebel stronghold. (AP Photo/Evgeniy Maloletka) (credit:ASSOCIATED PRESS)
Ukraine(11 of29)
Open Image ModalA convoy of Ukrainian military vehicles drive on the outskirts of Marinka, Donetsk region, eastern Ukraine, Thursday, June 4, 2015. Ukraine\'s president on Thursday warned of a possible large-scale offensive by separatist forces in the east, one day after a major battle erupted on the western edge of the main separatist rebel stronghold. (AP Photo/Evgeniy Maloletka) (credit:ASSOCIATED PRESS)
Ukraine(12 of29)
Open Image ModalA local resident rides her bicycle past an APC with Ukrainian soldiers from the 25th airborne brigade on the outskirts of Marinka, Donetsk region, eastern Ukraine, Thursday, June 4, 2015. Ukraine\'s president on Thursday warned of a possible large-scale offensive by separatist forces in the east, one day after a major battle erupted on the western edge of the main separatist rebel stronghold. (AP Photo/Evgeniy Maloletka) (credit:ASSOCIATED PRESS)
Ukraine(13 of29)
Open Image ModalA Ukrainian soldier from the 25th airborne brigade looks through the optical sight of a sniper rifle on the outskirts of Marinka, Donetsk region, eastern Ukraine, Thursday, June 4, 2015. Ukraine\'s president on Thursday warned of a possible large-scale offensive by separatist forces in the east, one day after a major battle erupted on the western edge of the main separatist rebel stronghold. (AP Photo/Evgeniy Maloletka) (credit:ASSOCIATED PRESS)
Ukraine(14 of29)
Open Image ModalUkrainian soldiers from the 25th airborne brigade stand atop an APC on the outskirts of Marinka, Donetsk region, eastern Ukraine, Thursday, June 4, 2015. Ukraine\'s president on Thursday warned of a possible large-scale offensive by separatist forces in the east, one day after a major battle erupted on the western edge of the main separatist rebel stronghold. (AP Photo/Evgeniy Maloletka) (credit:ASSOCIATED PRESS)
UKRAINE-RUSSIA-CRISIS(15 of29)
Open Image ModalCherkas, a russian citizen and volunteer with the Praviy Sektor (Right Sector) fighters, takes part in a personal training at the Praviy Sektor headquarters in a small village near Pokrovskoe, eastern Ukraine, on June 4, 2015. Praviy Sektor is a paramilitary group fighting alongside the regular army against separatists in the east of Ukraine. Ukrainian President Petro Poroshenko warned on June 4 of a \'colossal threat\' of renewed fighting with pro-Russian rebels after a surge in violence that left at least 26 people dead. AFP PHOTO / FABIO BUCCIARELLI (Photo credit should read FABIO BUCCIARELLI/AFP/Getty Images) (credit:FABIO BUCCIARELLI via Getty Images)
UKRAINE-RUSSIA-CRISIS(16 of29)
Open Image ModalCherkas, a russian citizen and volunteer with the Praviy Sektor (Right Sector) fighters, crawls under barbed wire during a personal training at the Praviy Sektor headquarters in a small village near Pokrovskoe, eastern Ukraine, on June 4, 2015. Praviy Sektor is a paramilitary group fighting alongside the regular army against separatists in the east of Ukraine. Ukrainian President Petro Poroshenko warned on June 4 of a \'colossal threat\' of renewed fighting with pro-Russian rebels after a surge in violence that left at least 26 people dead. AFP PHOTO / FABIO BUCCIARELLI (Photo credit should read FABIO BUCCIARELLI/AFP/Getty Images) (credit:FABIO BUCCIARELLI via Getty Images)
UKRAINE-RUSSIA-CRISIS(17 of29)
Open Image ModalA new Praviy Sektor (Right Sector) recruit takes aims with his Kalashnikov assault rifle during training at the Praviy Sektor headquarters in a small village near Pokrovskoe, eastern Ukraine, on June 4, 2015. Praviy Sektor is a paramilitary group fighting alongside the regular army against separatists in the east of Ukraine. Ukrainian President Petro Poroshenko warned on June 4 of a \'colossal threat\' of renewed fighting with pro-Russian rebels after a surge in violence that left at least 26 people dead. AFP PHOTO / FABIO BUCCIARELLI (Photo credit should read FABIO BUCCIARELLI/AFP/Getty Images) (credit:FABIO BUCCIARELLI via Getty Images)
UKRAINE-RUSSIA-CRISIS(18 of29)
Open Image ModalA Ukrainian radical nationalist group Praviy Sektor (Right Sector) volunteer fighter detonates a bomb during training at the Praviy Sektor headquarters in a small village near Pokrovskoe, eastern Ukraine, on June 4, 2015. Praviy Sektor is a paramilitary group fighting alongside the regular army against separatists in the east of Ukraine. Ukrainian President Petro Poroshenko warned on June 4 of a \'colossal threat\' of renewed fighting with pro-Russian rebels after a surge in violence that left at least 26 people dead. AFP PHOTO / FABIO BUCCIARELLI (Photo credit should read FABIO BUCCIARELLI/AFP/Getty Images) (credit:FABIO BUCCIARELLI via Getty Images)
UKRAINE-RUSSIA-CRISIS(19 of29)
Open Image ModalUkrainian radical nationalist group Praviy Sektor (Right Sector) volunteer fighters stand at attention during the morning brief at their headquarters in a small village near Pokrovskoe, eastern Ukraine, on June 4, 2015. Praviy Sektor is a paramilitary group fighting alongside the regular army against separatists in the east of Ukraine. Ukrainian President Petro Poroshenko warned on June 4 of a \'colossal threat\' of renewed fighting with pro-Russian rebels after a surge in violence that left at least 26 people dead. AFP PHOTO / FABIO BUCCIARELLI (Photo credit should read FABIO BUCCIARELLI/AFP/Getty Images) (credit:FABIO BUCCIARELLI via Getty Images)
UKRAINE-RUSSIA-CRISIS(20 of29)
Open Image ModalUkrainian radical nationalist group Praviy Sektor (Right Sector) volunteer fighters stand at attention during the morning brief at their headquarters in a small village near Pokrovskoe, eastern Ukraine, on June 4, 2015. Praviy Sektor is a paramilitary group fighting alongside the regular army against separatists in the east of Ukraine. Ukrainian President Petro Poroshenko warned on June 4 of a \'colossal threat\' of renewed fighting with pro-Russian rebels after a surge in violence that left at least 26 people dead. AFP PHOTO / FABIO BUCCIARELLI (Photo credit should read FABIO BUCCIARELLI/AFP/Getty Images) (credit:FABIO BUCCIARELLI via Getty Images)
UKRAINE-RUSSIA-CRISIS(21 of29)
Open Image ModalUkrainian radical nationalist group Praviy Sektor (Right Sector) volunteer fighters stand as they prepare to go to the Mariinka frontline, at their headquarters in a small village near Pokrovskoe, eastern Ukraine, on June 4, 2015. Praviy Sektor is a paramilitary group fighting alongside the regular army against separatists in the east of Ukraine. Ukrainian President Petro Poroshenko warned on June 4 of a \'colossal threat\' of renewed fighting with pro-Russian rebels after a surge in violence that left at least 26 people dead. AFP PHOTO / FABIO BUCCIARELLI (Photo credit should read FABIO BUCCIARELLI/AFP/Getty Images) (credit:FABIO BUCCIARELLI via Getty Images)
UKRAINE-RUSSIA-CRISIS(22 of29)
Open Image ModalUkrainian radical nationalist group Praviy Sektor (Right Sector) volunteer fighters prepare their gear at their headquarters in a small village near Pokrovskoe, eastern Ukraine, on June 4, 2015. Praviy Sektor is a paramilitary group fighting alongside the regular army against separatists in the east of Ukraine. Ukrainian President Petro Poroshenko warned on June 4 of a \'colossal threat\' of renewed fighting with pro-Russian rebels after a surge in violence that left at least 26 people dead. AFP PHOTO / FABIO BUCCIARELLI (Photo credit should read FABIO BUCCIARELLI/AFP/Getty Images) (credit:FABIO BUCCIARELLI via Getty Images)
UKRAINE-RUSSIA-CRISIS(23 of29)
Open Image ModalUkrainian radical nationalist group Praviy Sektor (Right Sector) volunteer fighters load rounds for heavy weapons at their headquarters in a small village near Pokrovskoe, eastern Ukraine, on June 4, 2015. Praviy Sektor is a paramilitary group fighting alongside the regular army against separatists in the east of Ukraine. Ukrainian President Petro Poroshenko warned on June 4 of a \'colossal threat\' of renewed fighting with pro-Russian rebels after a surge in violence that left at least 26 people dead. AFP PHOTO / FABIO BUCCIARELLI (Photo credit should read FABIO BUCCIARELLI/AFP/Getty Images) (credit:FABIO BUCCIARELLI via Getty Images)
UKRAINE-RUSSIA-CRISIS(24 of29)
Open Image ModalA Ukrainian radical nationalist group Praviy Sektor (Right Sector) volunteer fighter fires his assault rifle during training at the Praviy Sektor headquarters in a small village near Pokrovskoe, eastern Ukraine, on June 4, 2015. Praviy Sektor is a paramilitary group fighting alongside the regular army against separatists in the east of Ukraine. Ukrainian President Petro Poroshenko warned on June 4 of a \'colossal threat\' of renewed fighting with pro-Russian rebels after a surge in violence that left at least 26 people dead. AFP PHOTO / FABIO BUCCIARELLI (Photo credit should read FABIO BUCCIARELLI/AFP/Getty Images) (credit:FABIO BUCCIARELLI via Getty Images)
UKRAINE-RUSSIA-CRISIS(25 of29)
Open Image ModalA Ukrainian service man holds a gun during fightings in the Ukrainian city of Mariinka, in the region of Donetsk on June 4, 2015. Ukrainian President warned of the \'colossal threat\' of a resumption of major clashes in eastern Ukraine where at least 24 people have died in renewed fighting between government forces and pro-Russian rebels.\nAFP PHOTO/ OLEKSANDR RATUSHNIAK (Photo credit should read OLEKSANDR RATUSHNIAK/AFP/Getty Images) (credit:OLEKSANDR RATUSHNIAK via Getty Images)
UKRAINE-RUSSIA-CRISIS(26 of29)
Open Image ModalA Ukrainian serviceman stands with a gun during fightings in the Ukrainian city of Mariinka, in the region of Donetsk on June 4, 2015. Ukrainian President warned of the \'colossal threat\' of a resumption of major clashes in eastern Ukraine where at least 24 people have died in renewed fighting between government forces and pro-Russian rebels.\nAFP PHOTO/ OLEKSANDR RATUSHNIAK (Photo credit should read OLEKSANDR RATUSHNIAK/AFP/Getty Images) (credit:OLEKSANDR RATUSHNIAK via Getty Images)
UKRAINE-RUSSIA-UNREST(27 of29)
Open Image ModalPraviy Sektor (Right Sector) fighters take a nap in their room at their headquarter in a small village near Pokrovskoe on June 3, 2015. Right Sector is a paramilitary group that fights with the governmental army against separatists for the control of Eastern Ukraine. AFP PHOTO / FABIO BUCCIARELLI (Photo credit should read FABIO BUCCIARELLI/AFP/Getty Images) (credit:FABIO BUCCIARELLI via Getty Images)
UKRAINE-RUSSIA-UNREST(28 of29)
Open Image ModalA Praviy Sektor (Right Sector) fighter, aged 70, poses for a pictures while he makes exercizes at their headquarter in a village near Pokrovskoe on June 3, 2015. Right Sector is a paramilitary group that fights with the governmental army against separatists for the control of the East of Ukraine. AFP PHOTO / FABIO BUCCIARELLI (Photo credit should read FABIO BUCCIARELLI/AFP/Getty Images) (credit:FABIO BUCCIARELLI via Getty Images)
UKRAINE-RUSSIA-UNREST(29 of29)
Open Image ModalPraviy Sektor (Right Sector) fighters get ready at their headquarter in a small village near Pokrovskoe, eastern Ukraine on June 3, 2015 before going to the frontline in Eastern Ukraine. Right Sector is a paramilitary group that fights with the governmental army against separatists for the control of the East of Ukraine. AFP PHOTO / FABIO BUCCIARELLI (Photo credit should read FABIO BUCCIARELLI/AFP/Getty Images) (credit:FABIO BUCCIARELLI via Getty Images)