Exhaustive search underway in Iran to rescue downed F-15 airman

The U.S. military is in a race against time to find an airman who was in a F-15E Strike Eagle when it appears to have been shot down by Iran, according to a U.S. official. A second airman was rescued alive and taken out of the country for medical treatment, according to the official. NBC News’ Courtney Kube reports.