How difficult will it be to recapture Mosul from ISIS?

Aired: 2/20/2015 | 0:04:27 | Clip
At a briefing this week, a U.S. official announced plans to take back Iraq’s second biggest city, Mosul, from Islamic State fighters who captured it last june. What are the chances that the operation will succeed? Douglas Ollivant, a military planner in Iraq who served on the National Security Council joins Hari Sreenivasan from Washington D.C. with the latest.