Photo Gallery: Thousands Greet Discovery

The orbital space shuttle Discovery arrived in Virginia piggyback atop the Shuttle Carrier Aircraft, a modified Boeing 747, with a T-38 escort. 

After an initial flyover of Dulles International Airport, the team headed into Washington, D.C., flying low along the Potomac River and past many of the monuments, memorials and government buildings. 

About an hour later, Discovery flew over Dulles once again, before its final approach and landing.  Its new home is the National Air and Space Museum Steven F. Udvar-Hazy Center.

The Enterprise space shuttle currently on display at Udzar-Hazy was an atmospheric test vehicle and is being replaced by Discovery.  Enterprise will be flown to JFK International Airport later this spring, then moved by barge to the Intrepid Sea, Air and Space Museum.

"Discovery is the most traveled spaceship, leading the fleet with 39 missions," according to the Library of Congress.

NASA's five shuttles were:

•  Space Shuttle Atlantis
• Space Shuttle Challenger
• Space Shuttle Columbia
• Space Shuttle Discovery
• Space Shuttle Endeavour