Don't tell the troops at Walter Reed the war is 'winding down'

The last American combat troops are expected out of Afghanistan by the end of 2014. But don't tell the troops at Walter Reed the war in Afghanistan is winding down. Amputations -- many of them multiple -- have gone up to more than 20 a month.

Staff Sgt. Eric Meyers, Lance Cpl. Chad Ohmer, Lance Cpl. Timothy Donley, and Lance Cpl. Garret Carnes are featured in another timely report from CBS's David Martin.