A tour bus in the Bronx flipped onto its side and slid into a sign post early Saturday morning, killing 15 people. (Thirteen died at the scene and two more died later.) The New York Fire Department said the bus overturned on the southbound side of Interstate 95, and the sign post sliced off the top of the bus along the window line for nearly two-thirds of the vehicle's length. The bus was carrying 31 to 33 passengers. In addition to the 13 confirmed killed, six people were critically injured and another 11 sustained minor injuries.