Investigators with the National Transportation Safety Board are in the initial stages of what's setting up to be a sprawling and consequential probe into a deadly, midair crash between a regional passenger jet and a military helicopter just outside D.

After a very long grieving process, the families of the victims will be seeking out legal representation to investigate if anyone made a preventable mistake.

An American Airlines commercial flight and an Army Black Hawk chopper crashed midair on Jan. 29. Here are updates on this developing story.

Divers are expected to return to the Potomac River as part of the recovery and investigation after the United States’ deadliest aviation disaster in almost a quarter century.

Officials say the conditions of the Potomac River are complicating recovery efforts of the bodies of the 67 presumed dead in a mid-air collision between American Airlines flight 5342 from Wichita and a military Black Hawk helicopter.

We are now at the point where we are switching from a rescue operation to a recovery operation,” said John Donnelly, the fire chief in the nation’s capital.

An American Airlines plane and a U.S. Army helicopter collided near Reagan National Airport and crashed into the Potomac River, according to officials.

A regional jet carrying 64 people collided with an Army Black Hawk helicopter. Reagan National Airport grounded all flights.

No survivors found in crash between Black Hawk helicopter and American Airlines jet over Potomac River near DC

Multiple 911 callers reported the crash near the river just before 8:55 p.m., according to the Metropolitan Police Department and the District of Columbia Fire and EMS.

The catastrophe immediately raised questions about the close proximity in which helicopters and jetliners soar over the busy skies of the nation’s capital.

A timeline of the tragic collision between a commercial plane and a Black Hawk helicopter over the Potomac River, with insights into the ongoing investigation.