Question: The Man Who Saved the World is a film about a Lieutenant colonel who had a roll in what 1983 incident?

Context paragraphs:
Senior lieutenant colonel: Senior lieutenant colonel ("SLTC") is a senior officer rank in the Singapore Armed Forces, ranking just above lieutenant colonel and below colonel.  The senior lieutenant colonel rank designates those who have been tapped for higher appointments in the army, navy and air force.  The insignia for the rank of SLTC consists of two Singapore state crests and a pair of laurels.

William Rankin: Lieutenant Colonel William Henry Rankin (October 16, 1920 - Pittsburgh — July 6, 2009 - Oakdale) was the only known person to survive a fall from the top of a cumulonimbus thunderstorm cloud.  He was a pilot in the United States Marine Corps and a World War II and Korean War veteran.  He was flying an F-8 Crusader jet fighter over a cumulonimbus cloud when the engine failed, forcing him to eject and parachute into the cloud.  Lieutenant Colonel Rankin wrote a book about his experience, "The Man Who Rode the Thunder".

Mark Thomson: Mark Thomson (1739 - December 14, 1803) was a United States Representative from New Jersey.  Born in Norriton Township (near Norristown, Pennsylvania), he engaged in milling, was justice of the peace of Sussex County, New Jersey in 1773, and was a member of the provincial convention in 1774 and of the Provincial Congress in 1775.  He was commissioned lieutenant colonel of the First Regiment, Sussex County Militia on July 22, 1775 and was lieutenant colonel in Col. Charles Stewart's Battalion of Minutemen, February 15, 1776; colonel of the First Regiment, Sussex County Militia, July 10, 1776; and colonel of the Battalion of Detached New Jersey Militia, July 18, 1776.

Lieutenant colonel: Lieutenant colonel is a rank of commissioned officer in the armies and most marine forces and some air forces of the world, above a major and below a colonel.  The rank of lieutenant colonel is often shortened to simply "colonel" in conversation and in unofficial correspondence.  Sometimes, the term, 'half-colonel' is used in casual conversation in the British Army.  A lieutenant colonel is typically in charge of a battalion in the army.

Stanislav Petrov: Stanislav Yevgrafovich Petrov (Russian: Станисла́в Евгра́фович Петро́в ; 7 September 1939 – 19 May 2017) was a lieutenant colonel of the Soviet Air Defence Forces who became known as "the man who single-handedly saved the world from nuclear war" for his role in the 1983 Soviet nuclear false alarm incident.

Víctor Ivo Acuña Velázquez: Víctor Ivo Acuña Velázquez (1966–2007) was a Cuban Communist and Lieutenant Colonel in the Revolutionary Armed Forces.  In 1983 Acuña Velázquez enrolled in the General Carlos Rolof Military Academy, from which he graduated as a communications engineer.  In his military career, he occupied various posts linked to the specialty of communications, and he rose successively in rank until attaining that of lieutenant colonel.  Acuña Velázquez was murdered in 2007 when he tried to stop two hijackers of an airplane at José Martí International Airport.  He was then awarded the "Antonio Maceo Medal of Valor" posthumously by Raúl Castro.

Qazi Altaf Hussain: Lieutenant Colonel Qazi Altaf Hussain (1920–1999) served in the British Indian Army later taking up a place in the Army of Pakistan.  He advanced to various positions of leadership during his military career, serving as lieutenant colonel of the 11 Frontier Force Regiment, commandant of the Zhob Militia in Quetta, Pakistan, and commander of a regiment in the Indo-Pakistani War of 1965.  He was forced to retire as a lieutenant colonel, instead of advancing to general, as a result of his short-tempered, frank and outspoken nature.

1st Para-Commando Battalion: The 1st Para-Commando Battalion (also known as The Cheetahs) is an elite Commando unit in the Bangladesh Army, established in 1976 inspired by the British Special Air Service.  Headquartered in Sylhet, its raising commanding officer was Lieutenant Colonel Md.  Zahurul Alam (retired as brigadier general in 2010).  Some renowned officers of this unit are (before raising this unit, they were commandos but they were not in any commando unit.  But now the commando unit has been raised so that their name has been kept in this unit.  They all are war heroes, so it's also an honour for this unit): Late Lieutenant General Ziaur Rahman, Late Brigadier Khaled Mosharraf, Late Colonel A.T.M. Haider, Late Colonel Abu Taher, Lieutenant Colonel (Shaheed) Abdus Salam, Lieutenant Colonel Md.  Mustafizur Rahman, Colonel Saiful Islam, Late Major M. Anwar Hossain (Hell Commando) etc.

The Man Who Saved the World: The Man Who Saved the World is a 2014 feature-length Danish documentary film by film maker Peter Anthony about Stanislav Petrov, a former lieutenant colonel of the Soviet Air Defence Forces and his role in preventing the 1983 Soviet nuclear false alarm incident from leading to nuclear holocaust.

USS Leftwich: USS "Leftwich" (DD-984) was a "Spruance"-class destroyer built by the Ingalls Shipbuilding Division of Litton Industries at Pascagoula, Mississippi.  She was named for Lieutenant Colonel William G. Leftwich, Jr., USMC (1931–1970), who was killed in action at Quang Nam in the Republic of Vietnam on 18 November 1970 in a helicopter crash during the extraction of one of his reconnaissance teams.  For this action, Lieutenant Colonel Leftwich received the Silver Star.  Lieutenant Colonel Leftwich's medals and awards include: the Navy Cross, the Silver Star (posthumous), the Legion of Merit with Combat "V” and two gold stars, the Meritorious Service Medal, the Air Medal with one gold star, the Purple Heart with two gold stars, and various personal awards from the Republic of Vietnam.

Supporting paragraphs: The Man Who Saved the World Stanislav Petrov
Answer: Soviet nuclear false alarm incident