Group 8 astronauts also performed important ground-based duties. Sally Ride served on the Rogers Commission after the Space Shuttle "Challenger" disaster in 1986, and on the "Columbia" Accident Investigation Board after the Space Shuttle "Columbia " disaster in 2003. Sixteen members of the group served various selection boards for later groups of astronauts, the first being for NASA Astronaut Group 10 in 1984. Dan Brandenstein was Chief of the Astronaut Office from April 1987 through September 1992, and Hoot Gibson from December 1992 to September 1994. Dan Brandenstein had been CAPCOM for the first Space Shuttle mission in April 1981, and Shannon Lucid continued to perform as CAPCOM duties for shuttle missions until and including STS-135, the final Space Shuttle mission in 2011. She retired on January 31, 2012.