Question: What member of the Man in Space Soonest program became the seventh American in space?

<P0-S0>  The program was cancelled on August 1, 1958, and was replaced by NASA's Project Mercury. <P0-S1> Man In Space Soonest (MISS) was a United States Air Force (USAF) program to put a man into outer space before the Soviet Union. <P0-S2>  Only two men from the program would actually reach outer space. <P0-S3>  The first, Joseph A. Walker, did so twice in two X-15 rocket plane tests in 1963. <P0-S4>  Another, Neil Armstrong, became a NASA astronaut in 1962 and became the first person to walk on the Moon in 1969. <SEP> <P1-S0> The McLuhan Program in Culture and Technology started in 1963 as the Centre for Culture and Technology, initially a card pinned to the door of Marshall McLuhan's office in the English Department at the University of Toronto. <P1-S1>  It then had no organized program for research or teaching, but gained in prestige from the worldwide popularity of "Understanding Media" (1964) and grew in McLuhan's last decade in Toronto, assisted by Derrick de Kerckhove and McLuhan's son Eric, who became a director of the McLuhan Program International. <P1-S2>  In 1994, the McLuhan Program became a part of the University of Toronto's Faculty of Information. <P1-S3>  The program's curriculum is based on the works of Marshall McLuhan and other media theorists. <P1-S4>  In 2009, the Faculty of Information launched the Coach House Institute (CHI) as a clearly defined research unit under which the McLuhan Program in Culture and Technology now operates. <P1-S5>  In 2016 under Interim Director, Prof Seamus Ross, the Institute receive approval for its renaming as the McLuhan Centre for Culture and Technology in recognition of Marshall McLuhan intellectual contributions. <P1-S6>  The McLuhan Program is now subsumed under this Centre. <SEP> <P2-S0> This American Life (TAL) is an American weekly hour-long radio program produced in collaboration with Chicago Public Media and hosted by Ira Glass. <P2-S1>  It is broadcast on numerous public radio stations in the United States and internationally, and is also available as a free weekly podcast. <P2-S2>  Primarily a journalistic non-fiction program, it has also featured essays, memoirs, field recordings, short fiction, and found footage. <P2-S3>  The first episode aired on November 17, 1995, under the show's original title, Your Radio Playhouse. <P2-S4>  The series was distributed by Public Radio International until June 2014, when the program became self-distributed with Public Radio Exchange delivering new episodes to public radio stations. <SEP> <P3-S0>  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. <P3-S1> 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. <P3-S2>  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).