Even if Sgt. Bowe Bergdahl was to be found guilty of desertion, no one imagines he would be executed. The last soldier to be put to death for that crime was Pvt. Eddie Slovik, whom World War II veteran Nick Gozik says was the bravest GI he encountered. On the anniversary of D-Day, Michael Daly reports on the only one of more than 20,000 convicted deserters during the war to suffer the ultimate penalty.