An American Airlines jet carrying 60 passengers and four crew members collided Wednesday with an Army helicopter while coming in for a landing at Ronald Reagan National Airport near Washington, D.C. Here, we look at what happened and, more broadly, at aviation safety in the U.S.

The United States' streak of more than 15 years without a major fatal airline crash came to a shocking end this week.

The National Transportation Safety Board hosted a media briefing on its investigation into Wednesday’s mid-air collision near the Ronald Reagan Washington National Airport.The collision involved a PSA Airlines Bombardier CRJ700 airplane and a Sikorsky H-60 military helicopter and killed 67 people.

The midair collision at Reagan National Airport on Wednesday night has presented Sean Duffy with a major crisis just hours after he was sworn in as secretary of transportation.

CBS News confirmed only one air traffic control worker was managing the helicopters when the crash between a military helicopter and passenger plane occurred in Washington D.C. That is a job normally done by two people.

The midair collision Wednesday night between a regional American Airlines passenger jet and a Black Hawk military helicopter over the Potomac River near Washington, D.C., was "absolutely" preventable,

Authorities are combing the Potomac River for a second day in search of victims and more clues behind the deadliest U.S. air crash in over 20 years.

Authorities are combing the Potomac River for a second day in search of victims and more clues behind the deadliest U.S. air crash in over 20 years.

Trump said that he based his claims that the crash could be blamed on diversity policies within the FAA on his "common sense."

The National Transportation Safety Board says it has recovered a cockpit voice recorder and flight data recorder from the American Airlines plane that collided with an Army Black Hawk helicopter near Reagan National Airport late Wednesday.

Sixty-seven people died in a collision between a Bombardier CRJ700 regional jet operated by PSA Airlines and a military Black Hawk helicopter.

Responders are working to recover the victims of Wednesday night's midair collision over Washington, D.C. It could be the deadliest crash to occur in U.S. airspace in at least 15 years.