2021-P CHRISTA McAULIFFE-TEACHER 99.9% PROOF Silver Dollar-86% TROY OZ. One 2021-P Silver One Dollar piece. The obverse (heads) features the life of CHRISTA MCAULIFFE, a social studies teach selected in 1985 to be a participant in NASA’s Teacher in Space Program. On January 28, 1986 McAuliffe and six astronauts were killed aboard the Challenger space […]