This week, the show travels back to the American Revolution to explore the science of the weapons used by all sides.

How an American veteran, a father of a 15-year-old daughter, found himself inside this sprawling detention center outside ...

"I kind of remember the impact of the explosion," Barco told the PBS series Frontline, which aired a story in 2010 about his unit called The Wounded Platoon. "They told me I was just walking around.