Short answers, pulled from the story.
Ronnie Walter Cunningham was born in Creston, Iowa, on the 16th of March 1932. He grew up watching movies that shaped his future path before graduating from Venice High School in Los Angeles, California, in 1950.
Walter Cunningham occupied the Lunar Module Pilot seat for the eleven-day flight of Apollo 7 on the 11th of October 1968. This mission marked the first launch of a crewed Apollo spacecraft despite carrying no actual Lunar Module.
Cunningham left NASA in 1971 following personnel changes where the position of mission commander for Skylab 2 went to Pete Conrad instead. He received an offer as backup commander but departed shortly after these decisions ended his government service career.
Since 2000 Walter Cunningham has written about what he called a hoax claiming humans were not controlling the temperature of the earth. In 2010 he published Global Warming: Facts versus Faith and argued that empirical evidence did not support global warming theories.
The International Space Hall of Fame inducted him in 1983 and the U.S. Astronaut Hall of Fame honored him in 1997. Additional inductions include the Iowa Aviation Hall of Fame in 2003, the San Diego Air & Space Museum in 2011, and the National Aviation Hall of Fame in 2018.