He was piloting a helicopter gunship, landed there, got out and saw American soldiers shooting babies, shooting old women, figured out what was going on, and he then took his helicopter and did something that undid his lifetime of conditioning as to who is an "us" and who is a "them."
Estaba pilotando  un helicóptero de combate, aterrizó, se bajó y vio a los soldados disparando a bebes disparando a ancianas, se dio cuenta de lo que pasaba, y tomó su helicóptero e hizo algo que cambió su vida entera de quién es "nosotros" y quién "ellos."