Lawmakers have expressed concerns about congestion in at Ronald Reagan Washington National Airport amid a constricted space.

The crash near Reagan National Airport has renewed questions about the airport's flight load, considering its small size, among other issues.

The airspace around Ronald Reagan Washington National Airport has long been problematic due to heavy military and commercial flight activity in the nation’s capital, according to industry insiders.

Investigators analyze flight data to understand the crash between an American Airlines jet and a military helicopter and exactly what was going on before disaster struck.

Authorities are investigating an apparent crash involving a regional jetliner and a helicopter

A passenger jet has collided with a helicopter while landing at Ronald Reagan National Airport near Washington.

An airplane collided with a helicopter while trying to land at the Ronald Reagan Washington National Airport on Wednesday night, officials said.

Ronald Reagan Washington National Airport is closed, according to an FAA alert posted Wednesday night. A ground stop will prevent planes from landing at the airport through at least 5 a.m. Thursday morning,

The staffing at the air control tower at Reagan National Airport was "not normal" when an American Airlines plane and Army helicopter collided on Wednesday night, a report shows.

“It is the American airport,” said Rep. Norma Torres (D-Calif.), who said Reagan National isn’t just the most convenient airport for lawmakers. “It’s the place where citizens all over the country come to lobby their members of Congress, their US senators on issues of extreme importance to them.”

It will be some time before investigators can offer clear answers to the cause of the midair crash at Ronald Reagan Washington National Airport but air traffic controller audio and radar reviewed by NPR offer some insight into what happened before.