Ret. General: Obama's Iraq Goals 'Very Difficult' to Accomplish Without Ground Forces

ABC News’ Elizabeth McLaughlin reports: Retired Gen. Carter Ham, who served as commander of U.S. and coalition forces in Mosul from 2004-2005, told ABC News’ Martha Raddatz on â€"This Weekâ€? Sunday that initial U.S. airstrikes against ISIS forces advancing toward the city of Erbil have...