A memorial plaque to the Challenger explosion victims. The text reads: "On Jan. 28, 1986, the space shuttle Challenger and its crew were lost in a tragic explosion. This memorial was presented by the students and staff of Bonanza High School in recognition of the courage, dedication, and spirit of these brave space pioneers." The astronauts on the shuttle are listed: * Gregory Jarvis * Ronald McNair * Ellison Onizuka * Judith Resnik * Dick Scobee * Michael Smith * And Christa McAuliffe - Teacher "Dedicated this seventh day of Feb. 1986"