New details show that the failures leading up to the midair collision of a regional jet and an Army helicopter were more ...

New details revealed by The Times show that the failures on Jan. 29 before an Army helicopter crashed into a jet near Reagan National Airport were far more complex than previously known.

United invested in a revolutionary new aircraft design with one giant wing and an extra-wide cabin. It could replace some of ...

Nancy A. Youssef is a national security correspondent whose reporting has focused largely on the U.S. military and the Arab world.