Yemen ravaged by cholera and war, what role does U.S. play?

A brutal, three-year civil war in Yemen has drawn in regional and global powers, led to the fastest growing cholera epidemic and, perhaps soon, famine. A Saudi coalition is lifting a recent blockade on the country after aid groups warned it would trigger a humanitarian disaster, but millions remain vulnerable. P.J. Tobia offers an update on the conflict and what the U.S. is doing there.