claim: William Howard Taft had personal ambition to become chief justice.
evidence: Pat Hennen -LRB- born April 27 , 1953 in Phoenix , Arizona -RRB- is an American former Grand Prix motorcycle road racer .. American. Americans. Grand Prix. Grand Prix motorcycle racing. motorcycle. motorcycle. road racer. road racing. He is best known for being the first American to win a 500cc Grand Prix motorcycle road race when he won the 1976 Finnish Grand Prix .. 1976 Grand Prix motorcycle racing season. American. Americans. Grand Prix. Grand Prix motorcycle racing. motorcycle. motorcycle. 1976 Finnish Grand Prix. 1976 Finnish motorcycle Grand Prix. Hennen began his career racing in dirt track events in Northern California , where his family had moved when he was young .. dirt track. track racing. He was successful enough to earn a place on the Suzuki factory Grand Prix racing team .. Suzuki. Suzuki. Grand Prix. Grand Prix motorcycle racing. Hennen finished third in the 1976 500cc road racing World Championship .. 1976 Grand Prix motorcycle racing season. The following year he again finish third in the World Championship and won the 1977 British Grand Prix at Silverstone .. Grand Prix. Grand Prix motorcycle racing. 1977 Grand Prix motorcycle racing season. British Grand Prix. British motorcycle Grand Prix. Silverstone. Silverstone Circuit. He was also the top point scorer at the 1978 Trans-Atlantic Match Races , scoring three wins , two seconds and a third .. 1978 Grand Prix motorcycle racing season. Hennen also won the New Zealand Marlboro series for three consecutive years -LRB- 1974 -- 75 , 1975 -- 76 and 1976 -- 77 -RRB- riding Suzuki TR500 , TR750 and RG500 machines .. 1976 Grand Prix motorcycle racing season. Suzuki. Suzuki. The Marlboro Series was run over five seasons , of which he won three .. Hennen 's career was cut short when he crashed competing in the 1978 Isle of Man TT .. 1978 Grand Prix motorcycle racing season. Isle of Man TT. Isle of Man TT. He had just recorded the first sub-twenty-minute lap in TT history when he struck a kerb at 150 m.p.h. .. There was a suggestion at the time that he had struck a bird although this is now considered to be unfounded rumour .. The subsequent crash caused severe head injuries from which Hennen was able to recover over time , but the lasting effects forced his retirement from racing .. Hennen currently resides in California and was inducted into the AMA Motorcycle Hall of Fame in 2007 .. AMA. American Motorcyclist Association. Motorcycle Hall of Fame. Motorcycle Hall of Fame