A look at the frequency of runway incursions in the United States and the preventative measures taken by the FAA to avoid collisions.

An Army Black Hawk helicopter collided with a regional jet near Ronald Reagan Washington National Airport on Wednesday evening, U.S. officials confirmed to ABC News.

The collision involved a Bombardier CRJ700 regional jet operated by PSA Airlines and a military Black Hawk helicopter.

American Airlines Flight 5342 from Wichita, Kansas, was attempting to land when the plane and a Black Hawk helicopter collided.

Scores of people were feared dead after an American Airlines regional passenger jet carrying 64 people collided with a U.S. Army Black Hawk helicopter and crashed into the frigid Potomac River near Reagan Washington National Airport.

In 2018, a passenger on a Southwest Airlines jet was killed after shrapnel from the plane's engine crashed through a window and caused such a drop in air pressure that a passenger suffered fatal injuries after nearly being sucked outside. It was the first death on a U.S. airline flight since 2009.

Wednesday's crash involving an American Airlines flight and Black Hawk helicopter marked the first commercial crash on U.S. soil in more than 15 years.

Authorities have switched to a recovery mission in the Potomac River following a midair collision between an American Eagle flight and an Army Black Hawk helicopter near Reagan National Airport in Washington,

The crash late Wednesday of American Eagle Flight 5342 near Reagan National Airport has brought fresh attention to a technology known as Traffic Alert and Collision Avoidance System, or TCAS, which was developed to prevent airplanes from colliding in midair after a series of tragic crashes.

United States President Donald Trump made a promise to Americans on Thursday morning. An American Airlines flight collided with a U.S. Army Black Hawk helicopter late on Wednesday evening. The regional jet and the helicopter crashed into the Potomac River,