Federal investigators looking for the cause of the January collision between a passenger jet and an Army helicopter near Washington, D.C., that killed 67 people are recommending a ban on some helicopter flights.

WASHINGTON, D.C. — The National Transportation Safety Board chairman called for immediate changes at Washington, D.C.'s Ronald Reagan Washington National Airport, saying the current helicopter routes around the airport "pose an intolerable risk to aviation safety."

The National Transportation Safety Board said the separation between helicopters and jets in the area was insufficient and increased “chances of a midair collision.”

It has been six weeks since 67 people died in a collision between an American Airlines flight and a U.S. Army Blackhawk helicopter in Washington, D.C.

NTSB gives update on January plane and helicopter crash near D.C. Watch live as the National Transport Safety Board (NTSB) gives an update on the collision between an American Airlines passenger jet and an Army helicopter as the plane prepared to land at Ronald Reagan National Airport in Washington,

The NTSB is expected to give an update on the midair collision between a passenger plane and helicopter over Washington, D.C. in January.

Watch live coverage as officials provide an update after an American Airlines flight collided with a military helicopter near Washington, D.C.’s Ronald Reagan National Airport, killing all 67 people aboard.

The January midair collision with the Army helicopter happened as the American Airlines jet was about to land at Ronald Reagan Washington National Airport. All 67 people on both aircraft died.