An American Airlines plane with 64 people on board collided with an Army helicopter over Washington, D.C., and crashed into ...

As of 4 p.m. Friday, a large crane, used to assist in Baltimore's Francis Scott Key Bridge collapse, was seen in the Potomac River to recover the remains of the Army helicopter left in the water.

In this image provided by the U.S. Coast Guard, wreckage is seen in the Potomac River near Ronald Reagan ... the U.S. that would require relocating key government officials.

(AP) — Police boats combed the banks of the Potomac River on Friday ... or attack were to necessitate the quick movement of key government officials. The American Airlines jet was carrying ...

An American Airlines regional jet went down in the Potomac River near Washington, D.C.'s Ronald Reagan Washington National ...

NTSB via AP Search efforts are seen around a wreckage site of a deadly midair collision between an American Airlines jet and an Army helicopter, in the Potomac River near Ronald Reagan Washington ...

After searching the river ... the Potomac River corridor toward its planned landing at National at the time, flight tracker maps show. Just as the aircraft neared Arlington Memorial Bridge ...

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

The collision over the Potomac River occurred at 8:47 p.m. Eastern time ... than a mile from the crash site near the Woodrow Wilson Bridge. Flight data is from ADS-B Exchange.