Editing Arlington National Cemetery (section)

===Other memorials===
[[File:USS Maine Mast Memorial.jpg|thumb|The USS ''Maine'' Mast Memorial]]
There are several memorials on the grounds of the cemetery. However, due to the lack of space for burials and the large amount of space that memorials take up, the U.S. Army now requires a joint or concurrent resolution from Congress before it will place new memorials at Arlington.

Near the Tomb of the Unknowns stands the [[USS Maine Mast Memorial|USS ''Maine'' Mast Memorial]], which commemorates the 266 men who died aboard the [[USS Maine (ACR-1)|USS ''Maine'']]. The memorial is built around a [[mast (sailing)|mast]] salvaged from the ship's wreckage. The memorial served as the temporary resting place for two foreign heads of state or government who died in exile in the United States during World War II, [[Manuel L. Quezon]] of the Philippines and [[Ignacy Jan Paderewski]] of Poland.

The [[Space Shuttle]] ''[[Space Shuttle Challenger|Challenger]]'' Memorial was dedicated on 20 May 1986, in memory of the crew of flight [[STS-51-L]], who [[Space Shuttle Challenger disaster|died during launch]] on 28 January 1986. Transcribed on the back of the stone is the text of the [[John Gillespie Magee, Jr.]] poem "[[High Flight]]", which was quoted by then President Ronald Reagan when he addressed the disaster. Although many remains were identified and returned to the families for private burial, some were not, and were laid to rest under the marker. Two crew members, [[Dick Scobee]] and [[Michael J. Smith (astronaut)|Michael Smith]], are buried in Arlington. On 1 February 2004, [[NASA]] Administrator [[Sean O'Keefe]] dedicated a similar memorial to those who died when the Shuttle ''[[Space Shuttle Columbia|Columbia]]'' [[Space Shuttle Columbia disaster|broke apart during reentry]] on 1 February 2003.<ref name="NASA">{{cite web| title=Columbia Memorial Dedicated at Arlington| publisher=NASA| url=http://www.nasa.gov/columbia/home/F_04_Memorials.html| access-date=July 29, 2011| archive-url=https://web.archive.org/web/20110918002921/http://www.nasa.gov/columbia/home/F_04_Memorials.html| archive-date=September 18, 2011| url-status=live}}</ref> Astronauts [[Laurel Clark]], [[David M. Brown|David Brown]], and [[Michael P. Anderson|Michael Anderson]], who were killed in the ''Columbia'' disaster, are also buried in Arlington.

The Lockerbie Cairn is a memorial to the 270 killed in the bombing of [[Pan Am Flight 103]] over [[Lockerbie]], Scotland. The memorial is constructed of 270 stones, one for each person killed in the disaster. In section 64, a memorial to the 184 victims of the [[September 11 attacks|11 September attacks]] on the Pentagon was dedicated 11 September 2002. The memorial takes the shape of a pentagon, and lists the names of all the victims who were killed. Unidentified remains from the victims are buried beneath it.<ref name="Pentagon">{{cite news| title=Remains of Pentagon Attack Victims Buried at Arlington| url=https://www.defense.gov/News/News-Stories/id/43465/| work=American Forces Press Service| publisher=Department of Defense| author=Jim Garamone| date=September 12, 2002| access-date=July 27, 2011| archive-date=June 8, 2011| archive-url=https://web.archive.org/web/20110608235447/http://www.defense.gov/news/newsarticle.aspx?id=43465| url-status=live}}</ref>

On 25 June 1925, President [[Calvin Coolidge]] approved a request to erect a Commonwealth [[Cross of Sacrifice]] with the names of all the citizens of the United States who died fighting in the Canadian forces during World War I. The monument was dedicated 11 November 1927, and after the Korean War and World War II the names of US citizens who died in those conflicts were added.

In 2008, a bronze [[Braille flag]] was installed as a monument to blinded or blind veterans, service members, and other Americans after the passing of the H.R. 4169 American Braille Flag Memorial Act.<ref>{{cite web |title=Text of H.R. 4169 (110th): American Braille Flag Memorial Act (Referred to Senate Committee version) |url=https://www.govtrack.us/congress/bills/110/hr4169/text |website=GovTrack.us |language=en}}</ref><ref>{{cite web |title=GovInfo |url=https://www.gpo.gov/fdsys/pkg/BILLS-110hr4169eh/content-detail.html |website=www.govinfo.gov |language=en}}</ref>

The [[Laos Memorial]], or Lao Veterans of America memorial, dedicated to Lao and Hmong veterans who served with [[US Special Forces]] and [[CIA]] advisors during the Vietnam War, to defend the Royal [[Kingdom of Laos]] from the [[North Vietnamese invasion of Laos]], is located on Grant Avenue near the eternal flame memorial to U.S. President [[John F. Kennedy]].<ref>Smith, Philip, Lao Veterans of America, Inc. Washington, D.C. (May 15, 1997), http://www.laoveteransofamerica.org {{webarchive|url=https://web.archive.org/web/20161227015927/http://www.laoveteransofamerica.org/ |date=December 27, 2016 }}</ref>

In 2012, legislation began moving through Congress to approve a "Place of Remembrance" at the cemetery. The memorial will be an [[ossuary]] designed to contain fragments of remains which are unidentifiable through DNA analysis. The remains will be cremated before placement in the memorial.<ref>"Fast Track: 'Place of Remembrance' Planned for Arlington." ''Navy Times.'' June 25, 2012.</ref>