The former FAA head tussled with Musk and wanted to fine SpaceX for safety violations. He resigned after Trump won the election and hasn't been replaced.

The Bombardier CRJ700 is a small single-aisle jet that can be arranged with seating for up to 78 passengers. American Airlines says its version is set up to fit 65 passengers. Introduced nearly 25 years ago,

National Transportation Safety Board investigators have released images that show the cockpit voice recorder and flight data recorder after it was recovered from the Bombardier CRJ700 plane involved in the deadly midair collision with an Army helicopter near Ronald Reagan National Airport Wednesday.

Here are images of the two aircraft involved in the crash, taken from airline websites and directly manufacturers.

Here is a photo of a standard PSA Airlines Bombardier CRJ700 series regional jet, from the American Airlines website. According to a brochure from Bombardier CRJ Series, the jet can hold up to 78 people. Per a flight manifest, American Eagle Flight 5342 from Wichita, Kansas had 60 passengers and four crew on board.

The type of jet involved in the crash was built by Canadian-based Bombardier as part of a line of smaller regional jets.

While acknowledging that the cause of the 29 January midair collision remains unknown, US president Donald Trump has cited diversity hiring practices by the Federal Aviation Administration and potential missteps by the pilots of a Sikorsky UH-60 Black Hawk helicopter.

The Bombardier CRJ700 regional jet was among the most popular types of aircraft to land at Reagan Airport in Washington.

The airliner involved in the DCA crash came into service 20 years ago and averaged around 50 flights per year.

The Army helicopter and regional American Airlines jet that collided over Washington are both workhorse aircraft that operate around the world on a daily basis.

Bombardier CRJ700 flight, a popular aircraft in smaller air hubs, was carrying Russian and US figure skaters when it collided with a US Army Black Hawk helicopter mid-air

The Army helicopter and regional American Airlines jet that collided over Washington are both workhorse aircraft that operate around the world on a daily basis.