American contractors guarding aid distribution sites in Gaza are using live ammunition and stun grenades as hungry Palestinians scramble for food, according to accounts and videos obtained by The Associated Press. Two U.S. contractors, speaking to the AP on condition of anonymity because they were revealing their employers’ internal operations, said they were coming forward because they were disturbed by what they considered dangerous and irresponsible practices. The contractor who provided the videos said the bullets were fired in all directions — in the air, into the ground and at times towards the Palestinians. The testimonies offer a rare glimpse inside an often-chaotic scene at these sites.