Ronald Reagan Washington National Airport reopened two runways following the Jan. 29 American Airlines flight and helicopter collision that killed 67 people. “Runways 4/22 and 15/33 at Reagan Washington National Airport (DCA) have reopened and we have increased the hourly arrival rate to 28 aircraft,

Officials previously closed runways and decreased the arrivals rate to aid the investigation into the Jan. 29 crash that killed 67 people.

A jet carrying 60 passengers and four crew members collided Wednesday with an Army helicopter while landing at Ronald Reagan National Airport in Arlington County, prompting a large search-and-rescue o

But even before the National Transportation Safety Board completes its investigation—a neurotically thorough process that will probably take about a year, and thus meshes poorly with the news cycle and the conspiracy-theorist cycle—it is easy to see some of the lines of inquiry that crash detectives will pursue.

Pilots who land at Reagan National face a unique set of complications, including short runways, scores of helicopters and a mountain-size no-fly zone.

More than 280 flights were delayed Friday at Reagan National Airport (DCA) due to the ongoing plane crash investigation. Some travelers were frustrated because the reason for the delays was not communicated to the passengers on all of the flights.