"It's the fourth world war over the prize of North America. And when you say prize, what do you mean? You mean the land," says "The American Revolution" co-director Ken Burns. "[The colonists] called it the Continental Army. They knew where they were going, and we have conveniently forgotten what was in the way and who was in the way," he adds, referring to Native Americans. Check out Margaret Hoover’s new interview on PBS, YouTube and wherever you get your podcasts. | Firing Line with Margaret

WATCH: See Margaret Brennan's full interview this morning with House Majority Leader Steve Scalise, a Louisiana Republican | Face The Nation