Washington Dulles National Airport and Ronald Reagan Washington National Airport will open its terminals at 3 p.m.

CNN: Flights still grounded amid security concerns

Washington (CNN) -- Every few moments another plane seemed to be bearing down on the Pentagon on Friday, but they were only on their final approach to nearby Ronald Reagan Washington National Airport.

CNN: STORY HIGHLIGHTS

Ronald Reagan National Airport in Washington, D.

CNN: FAA lifts some restrictions on small aircraft