• AP Photo/Marcio Jose Sanchez
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    Space Shuttle Endeavour mounted on NASA's Shuttle Carrier Aircraft, passes over the Golden Gate Bridge in San Francisco, Friday. Endeavour is making a final trek to the California Science Center in Los Angeles, where it will be permanently displayed.

  • Enoch Stone via Twitter
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    Enoch Stone tweeted this photo and said, "@LATimescitybeat Endeavour over Hollywood."

  • AP Photo/Jae C. Hong
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    Spectators take pictures as the Space Shuttle Endeavour mounted on NASA's Shuttle Carrier Aircraft (SCA) flies near Santa Monica, Calif., Friday.

  • Chris Dyball via Twitter
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    Chris Dyball snapped this shot on Instagram and tweeted, "Spotted! Space Shuttle Endeavor over the Golden Gate #spottheshuttle #sf"

  • AP Photo/Rich Pedroncelli
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    The space shuttle Endeavour passes over the California state Capitol Friday, in Sacramento, Calif.

  • AP Photo/Jae C. Hong
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    Space shuttle Endeavour, mounted on NASA's Shuttle Carrier Aircraft (SCA), flies over Edwards Air Force Base, Calif., Thursday.

  • AP Photo/Statesman.com, Alberto Martinez
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    Space shuttle Endeavour sits atop the shuttle aircraft carrier as it flies over downtown Austin, Texas, early Thursday. 

  • AP Photo/Marco Hanson
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    Endeavour sits atop the shuttle aircraft carrier as it flies over downtown Austin Thursday.

  • AP Photo/David J. Phillip
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    Space shuttle Endeavour sits atop NASA's Shuttle Carrier Aircraft, or SCA, Wednesday at Ellington Field in Houston.

  • AP Photo/David J. Phillip
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    Endeavour flies over Ellington Field atop the shuttle aircraft carrier Wednesday in Houston.

  • AP Photo/David J. Phillip
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    Endeavour sits atop the shuttle aircraft carrier as it taxis Wednesday at Ellington Field in Houston.

  • AP Photo/Houston Chronicle, Smiley N. Pool, Pool
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    The space shuttle Endeavour makes a low pass over Ellington Field during a flyover on Wednesday in Houston.

  • AP Photo/Houston Chronicle, Smiley N. Pool, Pool
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    Endeavour passes over petrochemical facilities on the Houston Ship Channel during a flyover on Wednesday.

  • AP Photo/Houston Chronicle, Smiley N. Pool, Pool
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    A crowd gathers around the space shuttle Endeavour after it landed at Ellington Field on Wednesday in Houston.

  • AP Photo/Pat Sullivan
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    The space shuttle rides atop a modified 747 jet past the Houston skyline, before stopping in the city en route to Los Angeles on Wednesday.

  • AP Photo/Gerald Herbert
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    Endeavour flies over NASA's Michoud Assembly Facility in New Orleans, where the external fuel tanks for the shuttle program were made.

  • AP Photo/Gerald Herbert
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    Space Shuttle Endeavour flies over the New Orleans skyline Wednesday.

  • AP Photo/John Raoux
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    Space shuttle Endeavour makes its departure from the Kennedy Space Center Wednesday in Cape Canaveral, Fla.

  • AP Photo/John Raoux
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    Space shuttle Endeavour makes its departure from the Kennedy Space Center Wednesday in Cape Canaveral, Fla.

  • AP Photo/NASA, Bill Ingalls
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    A worker at NASA's Kennedy Space Center photographs the space shuttle Endeavour from a hatch on the SCA at the Shuttle Landing Facility on Tuesday in Cape Canaveral, Fla.

  • AP Photo/NASA, Bill Ingalls
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    Next: This Just in from Space

    Workers pose for a photograph on the wing of NASA's Shuttle Carrier Aircraft, with the space shuttle Endeavour placed on top, at the NASA Kennedy Space Center, Shuttle Landing Facility on Tuesday in Cape Canaveral, Fla.