Zwei Space Shuttles Nase an Nase

dapdThe space shuttle Discovery, right, stands nose to nose at the Udvar-Hazy Center on Thursday, April, 19, 2012 in Dulles, Va. NASA turned over space shuttle Discovery on Thursday to the Smithsonian Institution, the first in its orbiter fleet to be tran

EPAepa03188819 The Enterprise space shuttle (L) and Discovery space shuttle (R) face each other after the Discovery transfer ceremony at Smithsonian National Air and Space Museums Steven F. Udvar-Hazy Center, in Chantilly, Virginia, USA, 19 April 2012. NA

EPAepa03188790 A blow up figure depicts an alien among a crowd of people attending the Discovery transfer ceremony at Smithsonian National Air and Space Museums Steven F. Udvar-Hazy Center, in Chantilly, Virginia, USA, 19 April 2012. NASA and Smithsonian

REUTERSFormer U.S. Senator and astronaut John Glenn (C) waves to the crowd at the National Air and Space Museums Udvar-Hazy Center for the arrival of space shuttle Discovery (back) while former shuttle commanders applaud in Virginia April 19, 2012. REUTER

REUTERSFormer U.S. Senator and astronaut John Glenn (C) delivers his speech in front of former shuttle Discovery commanders at the National Air and Space Museums Udvar-Hazy Center for the arrival of space shuttle Discovery (R) in Virginia April 19, 2012.

REUTERSFormer space shuttle Discovery commander Joe Engle stands in front of Discovery after its arrival at the National Air and Space Museums Udvar-Hazy Center in Virginia April 19, 2012.REUTERS/Gary Cameron (UNITED STATES - Tags: TRANSPORT SCIENCE TEC

dapdIn this photo provided byNASA, space shuttles Enterprise, left, and Discovery meet nose-to-nose at the beginning of a transfer ceremony at the Smithsonians Steven F. Udvar-Hazy Center, Thursday, April 19, 2012, in Chantilly, Va. Space shuttle Discover

EPAepa03188601 Ashley Koen (L) and Stephanie Harris (R) wear hats depicting the Discovery space shuttle, while standing in front of the Enterprise space shuttle, before a ceremony at Smithsonian National Air and Space Museums Steven F. Udvar-Hazy Center,

EPAepa03188801 The Discovery space shuttle is placed in position before a ceremony at Smithsonian National Air and Space Museums Steven F. Udvar-Hazy Center, in Chantilly, Virginia, USA, 19 April 2012. NASA and Smithsonian officials officially transfer Di

(NASA/Bill Ingalls)NASA 747 Shuttle Carrier Aircraft (SCA) with the space shuttle Discovery mated on top rolls into position for demating at Washington Dulles International Airport in Sterling, Virginia, April 18, 2012. Discovery, the first orbiter retire

dapdIn this photo provided by NASA, the space shuttle Discovery is suspended from a sling held by two cranes after the Boeing 747 carrier backed away at Washington Dulles International Airport, Thursday, April 19, 2012, in Sterling, Va. NASA will transfe

EPAepa03188371 A handout released by NASA on 19 April 2012 showing Space Shuttle Enterprise rolling from the Space Hangar at the Steven F. Udvar-Hazy Center prior to a transfer ceremony, in Chantilly, Virginia, USA on 19 April 2012. Space shuttle Discover