Rescue workers Thursday dug through debris from a building collapse that killed six people in Philadelphia, Pennsylvania, Wednesday, despite believing that no one else was trapped. Crews still need to search through roughly 20 percent of the site of the collapse, including the back of a thrift store onto which the vacant four-story building under demolition collapsed, an effort that was expected to last through the day, authorities said. At least 14 people were injured in the collapse. The sense of urgency had subsided after workers combed through bricks and rubble using buckets and their bare hands well through the night. A crane arrived at the site early Thursday to be used later in the search. Officials from the U.S. Department of Labor and Occupational Safety and Health Administration were at the scene.
