ALS, Autographed letter signed by Christa McAuliffe

Sharon Christa McAuliffe (née Corrigan; September 2, 1948 – January 28, 1986) was an American teacher and astronaut from Concord, New Hampshire and one of the seven crew members killed in the Space Shuttle Challenger disaster. In 1985, she was selected from more than 11,000 applicants to participate in the NASA Teacher in Space Project and was scheduled to become the first teacher in space.[3] As a member of mission STS-51-L, she was planning to conduct experiments and teach two lessons from Space Shuttle Challenger. On January 28, 1986, the shuttle broke apart 73 seconds after launch. After her death, schools and scholarships were named in her honor, and in 2004 she was posthumously awarded the Congressional Space Medal of Honor. Information provided by Wikipedia.