Streaks of light from planes taking off are shown in this long exposure photograph of the control tower at Reagan National Airport on April 20, 2011. (Ricky Carioti/The Washington Post)

Reagan National will be getting a major facelift in the next few months, part of $1-billion modernization of the 75-year-old airport. Plans include a new terminal to house short-hop flights on the north side of Terminal C, currently home to the airport’s executive offices. The project also includes space for new security checkpoints. On Wednesday, members of the Metropolitan Washington Airports Authority’ board of directors, got a preview of what the new National will look like when work is completed in 2021.

The brief video animation includes an exterior fly over of the soaring glass pavilion that will house new security checkpoints, leading in to Terminals B and C. The preview is likely to elicit “ohhs and ahhs,” but may also leave travelers wondering how the authority will be able to complete the project and keep traffic around the airport moving. MWAA officials concede it won’t be easy. Much of the work will be done at night when there is less traffic. While some preliminary work is set to be done this fall, much of the major work, including demolition of the airport’s executive offices to make way for a new short-hop terminal, won’t begin until next spring. The last major building project at National was the addition of Terminals B and C, which opened with fanfare in July 1997. The 1.1 million-square-foot addition was designed by César Pelli, who once worked for Eero Saarinen, the Finnish-American architect who designed the iconic terminal at Dulles International Airport.

This animated video provides a look at the changes that a $1 billion dollar renovation will bring to the Ronald Reagan Washington National Airport. The project, which begins in the fall, will include building a new commuter concourse on the airport's north side. (Metropolitan Washington Airports Authority)