Authorities are investigating after a small plane crashed into a multi-condo building in Methuen, Massachusetts, killing the pilot, a former mayor of Newburyport. It happened on Riverview Boulevard, across the Merrimack River from the Lawrence Municipal Airport, around 1 p.m. Tuesday. Methuen police and FAA officials say the 60-year-old male pilot was the only person on board the single-engine Sonex aircraft, which originated from Lawrence Municipal Airport, at the time of the crash and died at the scene.