DAVID BUIMOVITCH via Getty ImagesAn Israeli canon fires a 155mm shell toward the Gaza Strip from their position near Israel's border with the Palestinian enclave on July 24, 2014. US Secretary of State John Kerry spoke today to his counterparts in Qatar and Turkey, which support the Palestinian Islamist group Hamas, as he pressed for a Gaza ceasefire. AFP PHOTO / DAVID BUIMOVITCH (Photo credit should read DAVID BUIMOVITCH/AFP/Getty Images)