Helicopters should be barred from a four-mile stretch over the Potomac River when flights are landing on Reagan National Airport’s Runway 33, National Transportation Safety Board Chair Jennifer Homendy said as the NTSB unveiled “urgent safety recommendations” after the deadly mid-air collision in January.

The release of the reports followed a news conference by NTSB officials who said Federal Aviation Administration procedures that governed the airspace near Reagan National Airport before the crash allowed for an “intolerable risk” that increased the chance of midair collisions,

More than a month after an American Airlines plane and a Black Hawk helicopter collided near Reagan National Airport (DCA), killing 67 people, officials with the National Transportation Safety Board (NTSB) are calling for immediate changes to helicopter routes around DCA because they said it poses “an intolerable risk to aviation safety.