TRAINED TO HEAL ... AND TO KILLAll his life Greg McPartlin wanted to be a Marine corpsman, a medic skilled at saving lives. Three months of bagging-and-tagging bodies during Vietnam s Tet Offensive took the luster off of being a Marine but not off McPartlin’s desire to serve his country.After assisting in the sea recovery of Apollo 11 the first ship to bring men to the moon the twenty-year-old McPartlin was redeployed to Vietnam as an elite Navy SEAL. Barred as a medic from...