Steven F. Udvar-Hazy Center, also called the Udvar-Hazy Center, is the Smithsonian National Air and Space Museum (NASM)'s annex at Washington Dulles International Airport in the Chantilly area of Fairfax County, Virginia, United States. It holds numerous exhibits, including the Space Shuttle , the Discovery , and the Enola Gay Gemini 7 space capsule.
The 760,000-square-foot (71,000 m
2; 17-acre; 7.1 ha) facility was made possible by a $65 million donation in October 1999 to the Smithsonian Institution by Steven F. Udvar-Házy, an immigrant from Hungary and co-founder of the International Lease Finance Corporation, an aircraft leasing corporation. The main NASM building, located on the  National Mall in Washington, D.C., had always contained more artifacts than could be displayed, and most of the collection had been stored, unavailable to visitors, at the Paul E. Garber Preservation, Restoration, and Storage Facility in Silver Hill, Maryland. A substantial addition to the center encompassing restoration, conservation and collection-storage facilities was completed in 2010. Restoration facilities and museum archives were moved from the museum's Garber facility to the new sections of the Udvar-Hazy Center. 
Architecture and facilities
Entrance view with observation tower
Hellmuth, Obata, and Kassabaum, who also designed the National Air and Space Museum building, the Center required 15 years of preparation and was built by Hensel Phelps Construction Co. The exhibition areas comprise two large  hangars, the 293,707-square-foot (27,286.3 m 2) Boeing Aviation Hangar and the 53,067-square-foot (4,930.1 m 2) James S. McDonnell Space Hangar. The Donald D. Engen Observation Tower provides a view of landing operations at adjacent Washington Dulles International Airport. The museum also contains an IMAX theater. A  taxiway connects the museum to the airport. 
Phase Two of the Udvar-Hazy Center will be dedicated to the behind-the-scenes care of the Smithsonian's collection of aircraft, spacecraft, related artifacts and archival materials. On December 2, 2008, the Steven F. Udvar-Hazy Center received a gift of $6 million for phase two from
Airbus Americas Inc. -- the largest corporate gift to the Smithsonian Institution in 2008. 
The wing includes:
Mary Baker Engen Restoration Hangar -- spacious enough to accommodate several aircraft at one time with a second-floor viewing area designed to give visitors a behind-the-scenes look.  Archives -- the foremost collection of documentary records of the history, science and technology of aeronautics and space flight will be housed in a single location for the first time, providing researchers with ample space and equipment.
 The Emil Buehler Conservation Laboratory -- provides conservators much-needed space to develop and execute specialized preservation strategies for artifacts.
 Collections processing unit -- a dedicated loading dock and specially designed secure area for initial inspection and analysis of artifacts. 
Main exhibition display area.
The Space Shuttle
in the space wing of Udvar-Hazy.
The center was opened on December 15, 2003. The Udvar-Hazy Center displays historic aviation and space artifacts, especially items too large for the National Air and Space Museum's building on the
National Mall, including: 
, the Enola Gay Boeing B-29 Superfortress which dropped the first atomic bomb on Hiroshima, Japan The orbital spacecraft
Space Shuttle was put on public display in the James S. McDonnell Space Hangar on April 19, 2012, replacing the atmospheric test vehicle, Discovery . Enterprise  A first-generation
tracking and data relay satellite (TDRS) that hangs directly above Discovery The
Gemini 7 space capsule A
Lockheed SR-71 Blackbird reconnaissance aircraft An
Air France Concorde supersonic airliner A United States Air Force
Lockheed L-1049, the military version of the  Lockheed Constellation ("Connie") airliner The
Boeing 367-80 ("Dash-80") jet transport, which was the prototype for the KC-135 tanker and the 707 airliner The only surviving
Bell XV-15 experimental tiltrotor craft A
Redstone rocket The only surviving
Verville-Sperry M-1 Messenger, the USAAS's first messenger aircraft The Langley Aerodrome A, an early attempt at powered flight by Smithsonian Secretary
Samuel Pierpont Langley The
Northrop N-1 experimental aircraft The only surviving
Boeing 307 Stratoliner, the ex- Pan Am Clipper Flying Cloud One of two surviving German
Heinkel He 219 Uhu night fighters The only surviving German
Dornier Do 335 Pfeil  fighter The only surviving German
Horten Ho 229 prototype flying wing jet fighter/ bomber The only surviving German
Arado Ar 234 Blitz jet bomber The only surviving German
Horten H.VI flying wing aircraft One of three surviving German
Bachem Ba 349 Natter rocket-powered interceptors The only surviving Japanese
Nakajima J1N1-S Gekko The only surviving Japanese
Aichi M6A1 Seiran One of four surviving
Northrop P-61 Black Widow night fighters One of two surviving
Boeing P-26 Peashooter fighters A
Bede BD-5, single-seat, home-built aircraft that was somewhat popular in the 1970s (5J version is the smallest manned jet aircraft) The
Beck-Mahoney , known as the "winningest" racing biplane in aviation history Sorceress A British
Hawker Hurricane fighter A Japanese
balloon bomb like the one that killed six U.S. civilians in Oregon during World War II
Lockheed Martin X-35 Joint Strike Fighter, prototype of the Lockheed Martin F-35 Lightning II
Grumman F-14 Tomcat fighter involved in the Gulf of Sidra incident (1989). The
, which was the first man-powered aircraft to fly across the English Channel Gossamer Albatross The primary special-effects miniature of the "Mothership" used in the filming of
Close Encounters of the Third Kind The
Virgin Atlantic GlobalFlyer piloted by Steve Fossett for the first solo nonstop and nonrefueled circumnavigation of Earth The
Winnie Mae, a Lockheed Vega piloted by Wiley Post The first aircraft operated by
FedEx, a Dassault Falcon 20 A piece of fabric from the
LZ 129 that survived the Hindenburg . Hindenburg disaster
Mercury-Atlas 10 unused Project Mercury spacecraft
U.S. Coast Guard Sikorsky HH-52 Seaguard helicopter A
Launch Entry Suit A
Vought RF-8 Crusader reconnaissance aircraft A
McDonnell Douglas F-4S Phantom II fighter A Soviet
Mikoyan-Gurevich MiG-15 fighter The
NASA Pathfinder, an early solar powered aircraft A
Piasecki PV-2 helicopter A French
Caudron G.4 bomber A German
Focke-Wulf Fw 190F fighter/bomber A British
Westland Lysander Army cooperation aircraft A
CASA 352L transport A
Republic F-105D Thunderchief fighter-bomber A
Lockheed P-38 Lightning fighter Darryl Greenamyer's
Grumman F8F Bearcat "Conquest I" racing aircraft The
North American P-51C Mustang "Excalibur III" fighter A
North American F-86 Sabre fighter A
Republic P-47 Thunderbolt fighter A
Grumman F6F-3 Hellcat fighter A Soviet
Mikoyan-Gurevich MiG-21 "Fishbed" fighter A
Beechcraft Bonanza A
Beechcraft Model 18 A
Bell 47 helicopter A
Bell H-13 Sioux helicopter A
Bell UH-1 Iroquois helicopter A
Boeing-Stearman Model 75 biplane trainer aircraft A
Grumman A-6E Intruder ground-attack aircraft A
Curtiss P-40E Kittyhawk fighter A
Vought F4U-1D Corsair fighter A
Piper J-3 Cub A
Grumman G-22 Gulfhawk An
Aeronca C-2 ultralight aircraft The
Stanley Nomad glider An
Arrow Sport A2 A
Space Systems/Loral FS-1300 communications satellite, previously a ground spare for Sirius Satellite Radio The
Shuttle Radar Topography Mission payload that flew on STS-99.
Bob Hoover's Shrike Commander Gondola of
Breitling Orbiter 3, the first balloon to fly around the world non-stop  Gondola C-49 of Goodyear Blimp Columbia (N4A), class GZ-20, and Gondola of Goodyear Pilgrim  
The museum is still in the process of installing exhibits, and 169 aircraft and 152 large space artifacts were on display as of May 2012,
and plans call for the eventual installation of over 200 aircraft.  The current list is maintained at the Objects On Display page of the Smithsonian Institution NASM Collections site. 
A number of events are held at the museum throughout the year.
These include lectures, book signings, sleepovers, and events for children. Some of the museum's larger events include Air & Scare for Halloween,  an open house,  and Innovations in Flight: Family Day and Outdoor Aviation Display.  
The center made its first media appearance in the 2009 film
. The center remained open while filming took place, although certain areas were closed. Transformers: Revenge of the Fallen The SR-71 that is on display in the museum was used as  Jetfire, a Decepticon who switches sides to become an Autobot, in the film. In the film, it is referred to simply as the National Air and Space Museum.
"Visitor Statistics". Smithsonian Newsdesk . Retrieved 2018.
^ Small, L. M. "A century's roar and buzz: Thanks to an immigrant's generosity, the Steven F. Udvar-Hazy Center opens to the public". In "From the Secretary".
Smithsonian. Vol. 34, p. 20.
Steven F. Udvar Hazy Center History
^ Triplett, W. "Hold everything!"
Smithsonian. Vol. 34, December 2003, p. 59.
^ a b c
"National Air and Space Museum Press Kit: Steven F. Udvar-Hazy Center Fact Sheet". Smithsonian Institution. Archived from the original on April 7, 2009 . Retrieved 2012.
^ a b c d
Ezell, Linda Neuman; Museum, National Air and Space (2004). . Smithsonian Institution, National Air and Space Museum. Building America's hangar: the design and construction of the Steven F. Udvar-Hazy Center ISBN . 9781904832072
Irvine, Madison (October 11, 2017). "Experience the History of Wartime Aviation at Steven F. Udvar-Hazy Center". Argunners . Retrieved 2019.
National Air and Space Museum Receives Gift from Airbus for Phase Two of the Steven F. Udvar-Hazy Center Archived January 11, 2009, at the Wayback Machine
"Space Shuttle Discovery Flies to the Smithsonian". Smithsonian National Air and Space Museum. April 17, 2012. Archived from the original on May 7, 2012 . Retrieved 2012.
"Lockheed 1049F-55-96 "Constellation" - National Air and Space Museum" . Retrieved 2019.
Dornier Do-335 Archived May 17, 2007, at the Wayback Machine
"Gondola, Breitling Orbiter 3" . Retrieved 2019.
"Goodyear Blimp Gondola Goes to Smithsonian" . Retrieved 2019.
"The Airships Land at the Udvar-Hazy Center" . Retrieved 2019.
"Steven F. Udvar-Hazy Center: Looking Ahead" Accessed September 30, 2006
"Events | National Air and Space Museum". airandspace.si.edu . Retrieved 2016.
"Air & Scare | National Air and Space Museum". airandspace.si.edu. Archived from the original on February 6, 2016 . Retrieved 2016.
"Steven F. Udvar-Hazy Center Open House | National Air and Space Museum". airandspace.si.edu. Archived from the original on February 6, 2016 . Retrieved 2016.
"Family Day and Outdoor Aviation Display - Innovations in Flight Aircraft Display". Innovations in Flight Aircraft Display . Retrieved 2016.
Keith Knight (June 7, 2008). "More High-Fliers at Air & Space". The Washington Post.