Flying at night and over water could have been factors in what led to an American Airlines plane colliding with a helicopter in Washington DC, an expert claims. The 64 people aboard the commercial jet and three soldiers in the Army helicopter died following the impact on Wednesday at around 9pm . Captain Chesley "Sully" Sullenberger, who famously landed a passenger plane on the Hudson River in New York City in 2009, has shared his taken on the tragedy, which happened near Ronald Reagan