Worst Hanford tank may be leaking into soil

HANFORD, Wash. -- In a late-night phone call to the governor, the new Secretary of Energy Ernest Moniz announced waste was likely leaking into the soil below a troubled double-shell tank. It was discovered by a crew doing routine maintenance to tank AY-102.

As Susannah Frame explains, they saw something they'd never seen before - uncovering more of Hanford's dirty secrets.