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.

Watch as the National Transportation Safety Board hosts 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.

National Transportation Safety Board holds news conference on deadly DC aircraft crash National Transportation Safety Board holds news conference on deadly DC aircraft crash. ––– Subscribe to ABC News on YouTube: Watch 24/7 coverage of breaking news and live events on ABC News Live: Watch full episodes of

ATLANTA, Ga. (Atlanta News First) - As the National Transportation Safety Board’s (NTSB) investigation into what caused the midair collision between an American Airlines jet and Army helicopter on Wednesday night ramps up, many are asking how the tragedy could have happened.

Here's what you need to know about the history of plane crashes in Mississippi. Here's what the NTSB says about where, when, why flight safety failed.

A military helicopter and passenger jet collided midair on Wednesday night near Reagan Washington National Airport, according to the Federal Aviation Administration. Here's what we know.

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.

Officials with the National Transportation Safety Board (NTSB) held their first press conference Thursday afternoon following a deadly collision just outside of Reagan National Airport (DCA) on Wednesday night.

Recovery efforts in Wednesday night's midair collision between a commercial jet and Army helicopter responsible for killing 67 people continue as the plane’s cockpit voice recorder

NBC News is live with a special report as the National Transportation Safety Board holds another briefing on the D.C. plane crash.