By Emily Macrander
"I'm a new man."
Eduardo Cavazos Garza was speaking to himself, or out loud. He wasn't sure and didn't really care. He was on a boat, floating down another South Vietnam river. It was the summer of 1969. He was in his early 20s. His life's possessions were in his army issue duffle. He was a combat engineer, trained to operate explosives, help out infantrymen and kill.