America's favorite pilot Sully Sullenberger reveals two factors that might have caused DC plane crash

Chesley B. Sullenberger III, the pilot who safely landed a passenger plane in the Hudson River in 2009, said the DC plane crash Wednesday night was caused by two factors though they are nothing technical and the aviation industry is now exceptionally safe. The descent was at night and over water and these two factors brought about the tragic crash that killed 64 people on board an American Airlines flight which collided with an Army Black Hawk helicopter with three soldiers on board mid-air.