Denver plane collision kills four 01/25/2003 Associated Press DENVER - Two small planes collided and crashed into a northwest neighborhood Friday, killing four people in the aircraft and injuring seven on the ground. There were no survivors on either plane, Denver Manager of Safety Tracy Howard said. Crews were still searching for other possible victims. A twin-engine plane crashed into a yard, narrowly missing a house and garage. Two people died in that plane, Mr. Howard said. Two people aboard the other plane, a single-engine aircraft, were killed when it crashed into a house, fire officials said. "That plane...