Question: When was the last living pilot of the X-15 program inducted into the National Aviation Hall of Fame ?

full_context: Document 1: Joseph A. Walker: Joseph Albert "Joe" Walker (February 20, 1921 – June 8, 1966) flew the world's first two spaceplane flights in 1963, thereby becoming the United States' seventh man in space. Walker was a Captain in the United States Air Force, an American World War II pilot, an experimental physicist, a NASA test pilot, and a member of the U.S. Air Force Man In Space Soonest spaceflight program. His two X-15 experimental rocket aircraft flights in 1963 that exceeded the Kármán line – the altitude of 100 km , generally considered to mark the threshold of outer space – qualified him as an astronaut under the rules of the U.S. Air Force and the Fédération Aéronautique Internationale (FAI).
Document 2: Charles Lindbergh: Charles Augustus Lindbergh (February 4, 1902 – August 26, 1974), nicknamed Slim, Lucky Lindy, and The Lone Eagle, was an American aviator, military officer, author, inventor, explorer, and environmental activist. At age 25 in 1927, he went from obscurity as a U.S. Air Mail pilot to instantaneous world fame by making his Orteig Prizewinning nonstop flight from Long Island, New York, to Paris. He covered the 33 ⁄ -hour, 3,600 smi alone in a single-engine purpose-built Ryan monoplane, "Spirit of St. Louis". This was the first solo transatlantic flight and the first non-stop flight between North America and mainland Europe. Lindbergh was an officer in the U.S. Army Air Corps Reserve, and he received the United States' highest military decoration, the Medal of Honor, for the feat.
Document 3: Charlie Johnson (pilot): Charles (Charlie) Johnson is a former president of Cessna Aircraft. He was born in 1942 in Georgia and grew up in Memphis. He has always been passionate about technology. Because he was also passionate about flight, he joined the Air Force. He fought in the Vietnam War flying the T-33, T-37, T-38, and the F-105. After the Vietnam War he continued with his love of flying. Johnson was a personal pilot for Arnold Palmer. After this he became a test pilot for Learjet. Soon after he rose through the ranks of Cessna to President and COO of Cessna Aircraft. Johnson joined Bye Aerospace in 2014 and was inducted into the Colorado Aviation Hall of Fame the same year. He has just recently been inducted into the Kansas Aviation Hall of Fame. Johnson continues to fly and has a love of cars.
Document 4: John Robinson (aviator): John Charles Robinson (November 26, 1903 – March 26, 1954) was an American aviator and activist who was hailed as the "Brown Condor" for his service in serving in the Imperial Ethiopian Air Force against Fascist Italy. Robinson pushed for equal opportunities for African-Americans during his early career, and was able to open his own eponymous aviation school in addition to initiating a program for black pilots at his college, the Tuskegee Institute. Robinson's achievements as an aviator were in stark contrast to the limited opportunities for most African-Americans in aviation careers, and were an important factor in reducing racially based prohibitions in the United States. Robinson is sometimes referred to as the "Father of the Tuskegee Airmen" for inspiring this all-black set of pilots who served during the United States' entry into World War II.
Document 5: Charles A. Lindbergh Chair in Aerospace History: The Charles A. Lindbergh Chair in Aerospace History, also known as the Lindbergh Chair, is a one-year senior fellowship hosted by the U.S. National Air and Space Museum (NASM), to assist a scholar in the research and composition of a book about aerospace history. Named for the famous aviator Charles Lindbergh, the position is competitive: one experienced scholar is selected each year from multiple applicants worldwide. Up to $100,000 is granted to the winner.
Document 6: John Glenn: John Herschel Glenn Jr. (July 18, 1921 – December 8, 2016) was a United States Marine Corps aviator, engineer, astronaut, and United States Senator from Ohio. In 1962 he became the first American to orbit the Earth, circling it three times.
Document 7: Ernest H. Buehl, Sr.: Ernest H. Buehl, Sr. (1897-1990) was a German-born aviator and aviation figure. He opened three airports, opened new flying routes, worked as a mechanic, operated a flying school and trained hundreds of pilots, including C. Alfred Anderson, who became the lead trainer of the Tuskegee Airmen.
Document 8: Jay Greene: Jay H. Greene is a retired NASA engineer. Between 2000 and 2004, he served as Chief Engineer at Johnson Space Center, where his role consisted primarily of advising the Center Director. He worked as a FIDO flight controller during the Apollo Program and a flight director from 1982 to 1986, most notably as ascent flight director during the Challenger accident in 1986. Greene worked for four years as a manager on the International Space Station project and received several awards for his work including the NASA Distinguished Service Medal. After his retirement in 2004 he served as a part-time consultant on the Exploration Systems Architecture Study. NASA Associate Administrator Rex Geveden described him as "a famous technical curmudgeon in the Agency."
Document 9: C. Alfred &quot;Chief&quot; Anderson: Charles Alfred Anderson, Sr., (February 9, 1907 – April 13, 1996) was an American aviator who is known as the "The Father of Black Aviation".
Document 10: Gordon Cooper: Leroy Gordon "Gordo" Cooper Jr. (March 6, 1927 – October 4, 2004), (Col, USAF), better known as Gordon Cooper, was an American aerospace engineer, test pilot, United States Air Force pilot, and one of the seven original astronauts in Project Mercury, the first manned space program of the United States.
Document 11: Albert Lee Ueltschi: Albert Lee "Al" Ueltschi (May 15, 1917 – October 18, 2012) is considered the father of modern flight training and was the founder of FlightSafety International. Ueltschi was once personal pilot to Juan Trippe and an associate to Charles Lindbergh. On July 21, 2001, he was enshrined at Dayton, Ohio, in the National Aviation Hall of Fame class of 2001, along with test pilot Joe Engle, United States Air Force flying ace Marion Carl, and USAF ace Robin Olds. In 2013, "Flying" magazine ranked Ueltschi number 13 on its list of the "51 Heroes of Aviation".
Document 12: William J. Knight: William John "Pete" Knight (November 18, 1929 – May 7, 2004), (Col, USAF), was an American aeronautical engineer, politician, Vietnam War combat pilot, test pilot, and astronaut in the X-20 Dyna-Soar and North American X-15 programs. Knight holds the world's speed record for flight in a winged, powered aircraft.
Document 13: Chesley Sullenberger: Chesley Burnett "Sully" Sullenberger III (born 1951) is an American retired airline captain celebrated for the January 15, 2009 water landing of US Airways Flight 1549 in the Hudson River off Manhattan after the plane was disabled by striking a flock of Canada geese immediately after takeoff; all 155 people aboard survived. Sullenberger is an international speaker on airline safety and has helped develop new protocols for airline safety. He served as the co-chairman, along with First Officer Jeffrey Skiles, of the EAA's Young Eagles youth introduction-to-aviation program from 2009 to 2013. He retired from US Airways after 30 years as a commercial pilot on March 3, 2010. In May of the following year, Sullenberger was hired by CBS News as an Aviation and Safety Expert.
Document 14: Chuck Yeager: Charles Elwood "Chuck" Yeager ( ; born February 13 , 1923) is a former United States Air Force general officer and record-setting test pilot. In 1947, he became the first pilot confirmed to have exceeded the speed of sound in level flight.
Document 15: Joe Engle: Joe Henry Engle (born August 26, 1932), (Maj Gen, USAF, Ret.), is an American pilot who served in the United States Air Force, test pilot for the North American X-15 program, aeronautical engineer, and a former NASA astronaut. As of 2017, he is the last living pilot of the X-15 program.
ground_truth: July 21, 2001