I heard this on the radio this morning and I did a little digging Skimming over the Vietnamese village of My Lai in a helicopter with a bubble-shaped windshield, 24-year-old Hugh Thompson had a superb view of the ground below. But what the Army pilot saw didn't make any sense: piles of Vietnamese bodies and dead water buffalo. He and his two younger crew mates, Lawrence Colburn and Glenn Andreotta, were flying low over the hamlet on March 16, 1968, trying to draw fire so that two gunships flying above could locate and destroy the enemy. On this morning, no one was shooting at them. And yet they saw bodies everywhere, and the wounded civilians they had earlier marked for medical aid were now all dead. more here He passed away on 7th January
Yeah, I saw a different version of that article. The one I saw described how he was ostracized and almost court martialed for trying to prevent the massacre. Such is the price for doing the right thing.