MSNBC Live with Tamron Hall 12/27/11

Iran oil threat

The Pentagon is firing back against Iran's threat to choke off a vital passageway that carries one sixth of the world's oil. Iran officials say they'll close the Strait of Hormuz, but the Pentagon says any disruption along the strait will “not be tolerated.” Deputy International editor for Time Magazine Bobby Ghosh joins NewsNation. ... more Duration: {{video.duration.momentjs}}