US President Barack Obama boards Air Force One at Joint Base Andrews outside Washington before departing for Seattle, May 10, 2012. Larry Downing/Reuters
A Marine honor guard stands at attention beneath the tail of Air Force One as he awaits the arrival of President Bush in New York on Nov. 11, 2008. Gerald Herbert/AP
President Barack Obama's reflection can be seen on the steps as he boards Air Force One at Buckley Air Force Base in Aurora, Colo., on April 25, 2012. Ed Andrieski/AP
In this Jan. 30, 2008, file photo, Air Force One casts a shadow on an expressway before landing at Los Angeles International Airport. President George W. Bush traveled to the California, Nevada, Colorado and Nevada for the next two days to attend Republican fund raisers. Operating under the same rules that have governed presidential travel dating back to the Reagan years, Obama must reimburse the government for a portion of the costs associated with any political travel. But presidents of both parties have been secretive about the complicated mechanics. Pablo Martinez Monsivais/AP
US President George W. Bush speaks to Vice President Dick Cheney by phone aboard Air Force One after departing Offutt Air Force Base in Nebraska, in this Sept. 11, 2001, photo. Eric Draper/White House/Reuters
Tech Sgt. Bret Baker (l.), instructs a group of flight attendants in training aboard a 757 or C32 at Andrews Air Force Base, Md., Feb. 2, 2012. Baker is a military flight attendant, part of a team serving America’s top government officials, their staffs, guests and reporters aboard 19 planes flown by the 89th Airlift Wing out of Joint Base Andrews near Washington. Their customers include the president, vice president, first lady, secretary of state, secretary of defense, and the Joint Chiefs of Staff. Ann Heisenfelt/AP
US Air Force One over Mount Rushmore in 2009. The publicity low-flying photo shoot by the presidential plane cost taxpayers $328,835 and scared people on the ground. White House officials said Obama was fuming mad and thinks Air Force One didn't need a new publicity photo anyway. US Air Force/AP/File
Air Force One kicks up a cloud of snow after landing at Cleveland Hopkins Airport in Cleveland Ohio, Jan. 4, 2012. President Obama was in town to speak on the economy at the high school in Shaker Heights, Ohio. Mark Duncan/AP
Military personal salute Air Force One, with President Obama aboard, as it prepares to take-off at Andrews Air Force Base, Md., Feb. 15, 2012. Cliff Owen/AP
White House photographer Pete Souza says of his 2010 photo of Air Force One 'The sun was setting as the Presidential motorcade arrived back at Miami International Airport. I ran to get in front of Air Force One so I could use the beautiful sky as the background when the President boarded the plane.' Pete Souza/White House
Air Force officers leave the flight line as Air Force One prepares to take-off in a rain storm at Andrews Air Force Base, Md., Jan. 17, 2010. Cliff Owen/AP
President Obama meeting with Gen. Stanley McChrystal, the top commander in Afghanistan, Oct. 2, 2009, aboard Air Force One in Copenhagen, Denmark. Months later the President accepted his resignation as the commander of US forces in Afghanistan.
Pete Souza/White House/AP/File
President Obama arrives at Detroit Metropolitan Airport aboard Air Force One, Jan. 26, 2012 in Romulus, Mich. Jerry S. Mendoza/AP
President Obama wears an Air Force One jacket during his first flight aboard the plane from Andrews Air Force Base to Newport News, Virginia, Feb. 5, 2009. Pete Souza/White House/Reuters/File
Marine One, with President Obama aboard, prepares to land near Air Force One at Los Angeles International Airport in Los Angeles, California, Feb. 16, 2012. Susan Walsh/AP
The sun sets behind Air Force One at Austin Bergstrom International Airport while President Obama visits Austin, Texas, May 10, 2011. Stephen M. Keller/AP
Air Force One, with President Obama and his family aboard, prepares to depart a snowy Andrews Air Force Base in Maryland, Dec. 24, 2009, for Hawaii to spend the holidays. Cliff Owen/AP/File
President Obama waves goodbye from the steps of Air Force One as he departs King Khalid International Airport in Riyadh, Saudi Arabia on his way to Cairo, June 4, 2009. Pete Souza/White House
President Bush waves as he boards Air Force One at Montana Air National Guard Base, Feb. 3, 2005 in Great Falls, Montana. Pablo Martinez Monsivais/AP/File
Skyler Zegel (l.) and twins Madison and Megan Zegel play on a barricade in front of Air Force One at Kirtland Air Force Base in Albuquerque, N.M., March 22, 2005, as they wait for President George W. Bush to arrive for his flight to Crawford, Texas, where his ranch is located. Jake Schoellkopf/AP/File
Air Force cheating scandal: Roughly half of the 183 missile launch officers at Malmstrom Air Force Base in Montana have been implicated in the cheating, say officials. About 40 were directly involved, while others knew what was happening and did not report it.
Scott M. Ash/US Air Force/AP
Top Air Force officials described a persistent culture of "undue stress and fear" that led 92 out of 550 members of the military's nuclear missile corps to be involved in cheating on a monthly proficiency test on which they felt pressured to get perfect scores to get promoted.