How did two killers escape from maximum security?

Aired: 6/8/2015 | 0:06:04 | Clip
In upstate New York, two prisoners from the state's largest maximum security prison were discovered missing Saturday. Since then, police have swept the town and countryside, searching for the two convicted murdered who cut through cement walls and steel gratings to emerge from a manhole outside the prison's walls. William Brangham talks to Jesse McKinley of The New York Times.