Reports that portable computer memory drives, often called flash drives, have been smuggled off a U.S. air base in Afghanistan and sold at local markets are raising concerns about military security. Officials at the base at Bagram, near the capital of Kabul and a hub for U.S. military activity in the nation, has tried to beef up security -- but according to The Los Angeles Times, the problem still exists. Alex Chadwick talks to Keith Kluwe, a former soldier who once worked at the base.