An archaeological dig at Germany's first concentration camp yields its secrets.

Berlin's Tempelhof airport was one of the city's main airports until it was closed in 2008. But the history of Tempelhof also has a dark side. The Nazis built one of their first concentration camps there. They called it Concentration Camp "Columbia." Columbia was all but forgotten until recently, when a team of archeologists began to explore its remains. Michael Scaturro has more.