Jonathan Koziol, a retired Army chief warrant officer with more than 30 years of flight experience, told reporters that the flight was a nighttime qualification flight with an instructor pilot evaluating an experienced pilot on the flight routes that their unit routinely flies day and night around the Potomac River.

More of the wreckage of an American Airlines regional plane was recovered Tuesday from last week's deadly midair collision over Washington, D.C., that sent the airliner and an Army Black Hawk helicopter crashing into the Potomac River.