Air crash investigations can take months, and federal investigators told reporters they would not speculate on the cause.

Officials confirmed there were "no survivors" among the 67 people aboard the aircrafts that collided mid-air over Washington DC ...

Republic Airways Flight 4514 had to abort a landing at Reagan National Airport because of a helicopter in its flight path ...

Vikesh Patel, a GE Aerospace engineer, and Asra Hussain Raza, a DC-based consultant, were on the doomed American Airlines ...