Boeing C-17 Globemaster III

The C-17 Globemaster III T-1 flies over Owens Valley, Calif., for a test sortie. (U.S. Air Force photo)

The C-17 Globemaster III T-1 takes off from Long Beach, Calif., on Sept. 15, 1991. (Photo courtesy of Boeing)

The C-17 Globemaster III T-1 on Sept. 15, 2011, the 20th anniversary of its first flight. (Photo courtesy of Boeing)

DAYTON, Ohio -- The U.S. Air Force's first C-17 (T-1) arrives at the National Museum of the U.S. Air Force after its final flight on April 25, 2012. This C-17 Globemaster III (S/N 87-0025) was essentially hand-built for the sole purpose of developmental test and evaluation, with an estimated life span of approximately five years. The aircraft was periodically rebuilt and refurbished over the years and its lifespan grew from five to 21 years. (U.S. Air Force photo by Jeff Fisher)

DAYTON, Ohio -- The U.S. Air Force's first C-17 (T-1) arrives at the National Museum of the U.S. Air Force after its final flight on April 25, 2012. This C-17 Globemaster III (S/N 87-0025) was essentially hand-built for the sole purpose of developmental test and evaluation, with an estimated life span of approximately five years. The aircraft was periodically rebuilt and refurbished over the years and its lifespan grew from five to 21 years. (U.S. Air Force photo by Jeff Fisher)

DAYTON, Ohio -- Col. Douglas Jaquish, Vice Commander of the Air Force Flight Test Center, Edwards AFB, Calif., "hands over" the U.S. Air Force's first C-17 (T-1) to Lt. Gen. (Ret.) Jack Hudson, director of the National Museum of the U.S. Air Force. The C-17 arrived at the museum after its final flight on April 25, 2012. (U.S. Air Force photo by Jeff Fisher)

DAYTON, Ohio -- Boeing C-17 Globemaster III at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- The U.S. Air Force's first C-17 (T-1) arrives at the National Museum of the U.S. Air Force after its final flight on April 25, 2012. In addition to its role as a flight test aircraft, T-1 is also a Hollywood star. The aircraft appeared in country superstar Toby Keith's Emmy Award-winning production of "American Soldier." T-1 went on to appear in five motion pictures: "Transformers," "Iron Man," "Transformers: Revenge of the Fallen," "Iron Man 2" and "Superman: Man of Steel" (to be released by Warner Brothers in 2013). (U.S. Air Force photo)

DAYTON, Ohio -- The C-17 is towed to its exhibit space in the Air Park at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- The C-17 is towed to its exhibit space in the Air Park at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Boeing C-17 Globemaster III in the Air Park at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Boeing C-17 Globemaster III in the Air Park at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Boeing C-17 cockpit at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio - Boeing C-17 cockpit at the National Museum of the U.S. Air Force. (U.S. Air Force photo by Ken LaRock)

DAYTON, Ohio - Boeing C-17 cockpit at the National Museum of the U.S. Air Force. (U.S. Air Force photo by Ken LaRock)

DAYTON, Ohio - Boeing C-17 cockpit at the National Museum of the U.S. Air Force. (U.S. Air Force photo by Ken LaRock)

DAYTON, Ohio - Boeing C-17 cockpit at the National Museum of the U.S. Air Force. (U.S. Air Force photo by Ken LaRock)

DAYTON, Ohio -- Boeing C-17 Globemaster III in the Air Park at the National Museum of the U.S. Air Force. (U.S. Air Force photo)