Since May, hundreds of Palestinians have been killed while trying to get food and medicine near Gaza aid sites run by the U.S.-backed Gaza Humanitarian Foundation, according to local officials. A video filmed last month by an American contractor appears to show Americans celebrating after someone gets shot. One contractor, who spoke on condition of anonymity, described what happened to our partners at BBC News. The U.S. and Israeli-backed group has denied any wrongdoing. CBS News' Debora Patta reports. Each weekday morning, "CBS Mornings" co-hosts Gayle King, Tony Dokoupil and Nate Burleson bring you the latest breaking news, smart conversation and in-depth feature reporting. "CBS Mornings" airs weekdays at 7 a.m. on CBS and stream it at 8 a.m. ET on the CBS News app.