Air Force One is a Boeing 747-200B modified to create a "flying oval office" to transport the [[President]] of the [[United States]] in air travel.
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[[File:Air Force One.jpg|thumb|upright=1.14|One of the [[Boeing VC-25|VC-25s]] used as Air Force One, registration, SAM 29000]]
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'''Air Force One''' is the [[air traffic control]] call sign of any [[United States]] [[United States Air Force|Air Force]] aircraft carrying the [[President of the United States]].<ref name="foxtrot">[http://www.faa.gov/airports_airtraffic/air_traffic/publications/atpubs/ATC/Chp2/atc0204.html#2-4-20 Order 7110.65R (Air Traffic Control)] Federal Aviation Administration 14 March 2007. Retrieved: 27 August 2007.</ref> Since 1990, the presidential fleet has consisted of two specifically configured, highly customized [[Boeing 747-200#747-200|Boeing 747-200B]] series aircraft – tail codes "28000" and "29000" – with Air Force designation "VC-25A". While these aircraft are referred to as "Air Force One" only while the president is on board, the term is commonly used to describe either of the two aircraft normally used and maintained by the U.S. Air Force solely for the president.
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Its name is taken from the radio call sign used when the president is aboard.<ref>http://www.boeing.com/defense-space/military/af1/</ref>
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When the president needs to fly to locations that have runways too short for the VC-25A, a [[Boeing C-32]] is used instead. An Air Force aircraft carrying the [[Vice President of the United States]] is designated as [[Air Force Two]].
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Due to high operating costs, the United States Air Force intends to replace the two current Boeing 747-200Bs with [[Boeing 747-8|Boeing 747-8Is]]. The Air Force announced the plan on 28 January 2015. The U.S. Air Force projected the budget to $4 billion USD, sparking tweets from then president-elect [[Donald Trump]] to cancel the order.<ref>{{cite news |url=http://www.defensenews.com/articles/trump-tweets-us-should-cancel-air-force-one-replacement |title=Trump Tweets US Should Cancel Air Force One Replacement |author= Mehta, Aaron |work=Defense News |date=6 December 2016 |accessdate=2017-03-03}}</ref><ref>[http://www.af.mil/News/ArticleDisplay/tabid/223/Article/562748/af-identifies-boeing-747-8-platform-for-next-air-force-one.aspx "AF Identifies Boeing 747-8 platform for next Air Force One."] ''United States Air Force'', 28 January 2015. Retrieved: 03 March 2017.</ref><ref>{{Cite web|url=http://www.boeing.com/defense/air-force-one/index.page#/overview|title=Boeing: Air Force One|website=www.boeing.com|access-date=2017-03-03}}</ref>