"In 1963...there was no way I could have known, sitting in a classroom on that beautiful campus in Ohio, that by raising my hand I would be going to war in Viet

Hundreds of unique color photos showing how soldiers decorated their helicopters during the Vietnam War.

How do we come to know the world around us? What about worlds apart from our own—outer space, distant cultures, or even long-past eras of history? Engaging Sm