The U.S. Marine Corps flew helicopters above an elementary school next to a U.S. air base in Okinawa on Thursday despite promising Japan it would try to avoid such flights after a window from a CH-53E chopper fell on the school grounds last month, the Japanese Defense Ministry said.But the allegation was denied by the Marines, saying its helicopters did not fly over the Futenma No. 2 Elementary School. The Japanese ministry, in a bid to prove the credibility of its claim, released video footage it says shows three U.S. helicopters flying over the school that afternoon.The Defense Ministry l…READ FULL ARTICLE