 Complete the following phrase:  The Christa McAuliffe Commemorative Coin Act of 2019  authorized the production of a commemorative silver dollar to commemorate the life of Christa McAuliffe, a former social studies teacher who in 1985, was chosen to be the first participant in the National Aeronautics and Space Administrations Teacher in Space program. On January 28, 1986, McAuliffe and six astronauts were tragically killed when 