Mayor Michael Nutter Promises Full Investigation

In the wake of a building collapse that left at least six people dead and more than a dozen injured in Philadelphia, Mayor Michael Nutter is promising a full investigation into the tragic incident.

The 4-story building, which was in the demolition process, took out a Salvation Army Thrift store next door. Search and rescue teams pulled one woman out of the rubble overnight after she had been trapped for more than 12 hours.

Mayor Nutter says city, state and federal officials will be part of the official investigation, but his focus on Wednesday was on the horrific human toll and sorting through the debris in the hunt for survivors.