An America fighting itself in "Civil War": "It's a warning"

America's darkest chapter has never been far from Hollywood's vivid imagination. From "Gone With the Wind" to "Glory" to "Lincoln," movies have brought us the barbarity and the politics of the Civil War. But what if the bloody 19th century conflict were merely our first civil war?

That's the premise of a new film, "Civil War," opening this week. It's an unflinching and relentless look at a nation divided and violent, not in the 1860s, but today.

"This could be us in, pick a year: 2025, 2026, 2024? Is that fair?" asked Turner Classic Movies host Ben Mankiewicz.