input: A succession of injuries hindered Safin's progress throughout his career. In 2003, he missed the majority of the season due to a wrist injury. During the 2005 clay-court season, Safin suffered a knee injury, which he played through all the way up to Wimbledon with the help of pain killers and anti-inflammatories. Safin was subsequently defeated in the early rounds of each of the seven tournaments he played between the Australian Open and the French Open, culminating in an early round defeat at the French Open. Safin made a surprise finals appearance at the Wimbledon tune-up tournament in Halle on grass. He lost the final narrowly to the defending champion, Federer. He only played one tournament in the summer hard-court season, in Cincinnati, where he lost in the quarterfinals to Robby Ginepri. He also missed the Tennis Masters Cup. Injuries continued to bother Safin in 2006. Although Safin made appearances at the 2006 ATP Masters tournaments at Indian Wells, Miami, Monte Carlo, Rome and Hamburg, his ranking plummeted to as low as No. 104. He began to recover in time for the 2006 US Open, in which Safin defeated Argentine David Nalbandian, who was then world No. 4 in a riveting second-round match. Safin then lost in the fourth round to former world No. 2 German Tommy Haas, also in a fifth-set tiebreaker. Positive performances at the Thailand Open, where he was narrowly edged out by No. 7 seed, James Blake, and the Kremlin Cup in Moscow, the first all-Russian final at that event, losing to compatriot, Ukrainian-born Nikolay Davydenko, marked Safin's recovery. Despite the injury, Safin still posted 7 wins against top ten players in 2006, fourth-most on the ATP tour behind just Federer (19), Nadal (10), and Blake (8).

Answer this question "What was the biggest injury he received?"
output: Safin suffered a knee injury,

Question: Charles Elwood "Chuck" Yeager (; born February 13, 1923) is a retired United States Air Force general officer, flying ace and record-setting test pilot. In 1947, he became the first pilot confirmed to have exceeded the speed of sound in level flight. Yeager's career began in World War II as a private in the United States Army Air Forces.

Yeager was foremost a fighter pilot and held several squadron and wing commands. From May 1955 to July 1957 he commanded the F-86H Sabre-equipped 417th Fighter-Bomber Squadron (50th Fighter-Bomber Wing) at Hahn AB, Germany, and Toul-Rosieres Air Base, France; and from 1957 to 1960 the F-100D Super Sabre-equipped 1st Fighter Day Squadron (later, while still under Yeager's command, re-designated the 306th Tactical Fighter Squadron) at George Air Force Base, California, and Moron Air Base, Spain. Now a full colonel in 1962, after completion of a year's studies at the Air War College, Yeager became the first commandant of the USAF Aerospace Research Pilot School, which produced astronauts for NASA and the USAF, after its redesignation from the USAF Flight Test Pilot School. (Yeager himself had only a high school education, so he was not eligible to become an astronaut like those he trained.) Between December 1963 and January 1964, Yeager completed five flights in the NASA M2-F1 lifting body. An accident during a December 1963 test flight in one of the school's NF-104s eventually put an end to his record attempts. In 1966 Yeager took command of the 405th Tactical Fighter Wing at Clark Air Base, the Philippines, whose squadrons were deployed on rotational temporary duty (TDY) in South Vietnam and elsewhere in Southeast Asia. There he accrued another 414 hours of combat time in 127 missions, mostly in a Martin B-57 Canberra light bomber. In February 1968, Yeager was assigned command of the 4th Tactical Fighter Wing at Seymour Johnson Air Force Base, North Carolina, and led the McDonnell Douglas F-4 Phantom II wing in South Korea during the Pueblo crisis. On June 22, 1969, Yeager was promoted to brigadier general and was assigned in July as the vice-commander of the Seventeenth Air Force. From 1971 to 1973, at the behest of Ambassador Joe Farland, Yeager was assigned to Pakistan to advise the Pakistan Air Force. In one of the numerous raids carried out by Indian pilots against Pakistani airfields, Yeager's plane was destroyed while it was parked at Islamabad airport. Edward C. Ingraham, a U.S diplomat who had served as political counselor to Ambassador Farland in Islamabad recalled this incident in the Washington Monthly of October, 1985: "After Yeager's Beechcraft was destroyed during an Indian air raid, he raged to his cowering colleagues that the Indian pilot had been specifically instructed by Indira Gandhi to blast his plane. 'It was,' he later wrote, 'the Indian way of giving Uncle Sam the finger.'"

Using a quote from the above article, answer the following question: What kind of military command was Chuck Yeager involved with?
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Answer:
On June 22, 1969, Yeager was promoted to brigadier general and was assigned in July as the vice-commander of the Seventeenth Air Force.