In this Dec. 2, 2010 photo, a school bus enters the intersection of 7th Avenue and Sterling Place in Brooklyn where a United Air Lines jet smashed into the Park Slope neighborhood fifty years ago follwing a midair collision with a TWA propeller plane a mile above New York. It was the deadliest air disaster up to that time, killing all 84 people on board the United airliner, the 44 people on board the TWA plane, and six people on the ground. (AP Photo/Mark Lennihan)