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.

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.

National Transportation Safety Board Chair Jennifer Homendy said Thursday at a press conference that “we look at facts on our investigation and that will take some time.”

The National Transportation Safety Board will be holding its first briefing into the investigation of the deadly American Airlines plane crash in Washington, DC. Click to watch.

The National Transportation Safety Board (NTSB) held a press conference on Jan. 30 after a deadly, fiery crash between American Airlines and a military helicopter near the Reagan National Airport. Officials said they would analyze the facts to determine the probable cause of the crash before issuing a report.

Live updates on the crash can be found here. The National Transportation Safety Board has begun an investigation into the deadly mid-air collision between an American Eagle regional jet and a military helicopter that left all 67 people onboard the aircrafts dead.