Air traffic controllers are exempt from a buyout offer President Trump’s administration introduced last week to nearly 2 million federal workers, including controllers. The clarification follows two deadly plane crashes,

The NTSB says when the Jan. 29 collision between a passenger plane and helicopter occurred, the air traffic control tower had five persons on duty.

Issues with air traffic control staffing are under the spotlight following the fatal mid-air collision between an American Airlines plane and a military helicopter in Washington D.C. on Wednesday that killed 67 people.