Most World War II vets will be more than happy to share, especially 60 years later. Those soldiers are very proud of what they did and were treated like heroes when they returned, unlike Vietnam vets. Should be an interesting interview.

Ask him whether he was drafted or went in voluntarily.

Ask him what branch of the military he was in and when he joined or was inducted.

Ask him what overseas countries he traveled to, what type of training he received, and whether or not he considered being a career military man. Ask him what he did when he was discharged and how the war changed him.

Ask him whether he was married during the time he was a soldier and, if so, how it affected his wife or, if he was single, how his parents felt about his military service. Ask him how he felt about the whole experience while you're at it.

Ask him how it changed his life or his views. Was he part of the forces that went across and stormed the beach at Normandy? Part of the forces that helps liberate concentration camps and saw Nazi atrocities? Part of the forces that saw action in the Pacific?

Watch the movies "The Best Years of Our Lives" (an old movie about returning WWII soldiers) and Clint Eastwood's two 2006 movies "Flags of Our Fathers" and "Letters from Iwo Jima." Or try and see a movie or two from the list at this site so you can learn a bit more about that war:
World War II Movies

Assignments weren't nearly this interesting in my history classes!