What is a black box, what can it tell us, and have the data recorders been found from Flight 5342 and the Army's Blackhawk?

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

American Airlines Flight 5342 from Wichita, Kansas, was attempting to land when the plane and a Black Hawk helicopter ...

All 67 people aboard an American Eagle flight from Kansas and an Army helicopter were killed in a collision Wednesday night ...

A regional jet carrying 64 people collided in midair with a Black Hawk helicopter as the plane was approaching a runway at ...

Around 4 p.m. Thursday at Reagan National Airport, all four TVs at the U Street Pub in Terminal 2 were streaming live ...

The fatal crash took place just before 9 p.m. Wednesday when American Airlines Flight 5342 attempted ... p.m., according to aircraft tracking site FlightAware. Live updates:'We will find ...

According to FlightRadar24.com, American Airlines Flight AA3130 was right behind American Eagle Flight 5342 before it quickly diverted to Baltimore.

While authorities focus on the cause of the US's deadliest aviation disaster since 2001, families are mourning their loved ones. Here's the latest.