The crash seems to have resulted from a series of human errors that cascaded to cause a freak accident. This past week has ...

The mangled remains of the Black Hawk helicopter involved in last week ... AP The maximum altitude for whirly-birds flying in the controlled airspace is 200 feet, according to the agency.

By Helmuth Rosales, K.K. Rebecca Lai, Mika Gröndahl and John Ismay What two Black Hawk pilots saw — or did not see — before the Jan. 29 crash along the Potomac River is unknown but critical ...