NASA:

NASA’s 747 Shuttle Carrier Aircraft (SCA) with space shuttle Discovery mounted atop will fly approximately 1,500 feet above various parts of the Washington, D.C. metropolitan area on Tuesday, April 17.The flight, in cooperation with the Federal Aviation Administration, is scheduled to occur between 10 and 11 a.m. EDT. NASA Television and the agency’s web site will provide live coverage.The aircraft is expected to fly near a variety of landmarks including the National Mall, Reagan National Airport, National Harbor and the Smithsonian’s Udvar-Hazy Center. When the flyover is complete, the SCA will land at Dulles International Airport.

If you’re lucky enough to live in the area, grab your camera and get some shots of this fly-over.