<p>The 25th mission in the Space Shuttle program, flown by the Challenger, ended tragically with the loss of its seven crew members and destruction of the vehicle when it exploded shortly after launch.</p>
<p>Back row from left to right: Ellison Onizuka, mission specialist; Christa McAuliffe, payload specialist; Gregory Jarvis, payload specialist; and Judith Resnik, mission specialist.</p>