Question: Which space mission did the man, in which the Onizuka Prop Wash Award is named after, perish?

Context:
Jay Barbree
Jay Barbree (born November 26, 1933) is a correspondent for NBC News, focusing on space travel.
 Barbree is the only journalist to have covered every manned space mission in the United States, beginning with the first American in space, Alan Shepard aboard "Freedom 7" in 1961, continuing through to the last mission of the Space Shuttle, "Atlantis's" STS-135 mission in July 2011.
 Barbree has been present for all 135 space shuttle launches, and every manned launch for the Mercury, Gemini, and Apollo eras.
 In total, Barbree has been witness to 166 manned space launches.
Ellison Onizuka
Ellison Shoji Onizuka (June 24, 1946 – January 28, 1986 ) was an American astronaut from Kealakekua, Hawaii, who successfully flew into space with the Space Shuttle "Discovery" on STS-51-C.
 He died in the destruction of the Space Shuttle "Challenger", on which he was serving as Mission Specialist for mission STS-51-L.
 He was the first Asian American and the first person of Japanese ancestry to reach space.
NASA Space Flight Medal
The NASA Space Flight Medal is a decoration of the National Aeronautics and Space Administration.
 According to its statutes, it is awarded "for significant achievement or service during individual participation as a civilian or military astronaut, pilot, mission specialist, payload specialist, or other space flight participant in a space flight mission."
 In practice, the medal is bestowed upon any astronaut (US or foreign) who flies aboard a United States space mission, and typically every subsequent flight is honored with an additional award.
Cluster II (spacecraft)
Cluster II is a space mission of the European Space Agency, with NASA participation, to study the Earth's magnetosphere over the course of nearly two solar cycles.
 The mission is composed of four identical spacecraft flying in a tetrahedral formation.
 As a replacement for the original Cluster spacecraft which were lost in a launch failure in 1996, the four Cluster II spacecraft were successfully launched in pairs in July and August 2000 onboard two Soyuz-Fregat rockets from Baikonur, Kazakhstan.
 In February 2011, Cluster II celebrated 10 years of successful scientific operations in space.
 The mission has been extended until December 2018.
 China National Space Administration/ESA Double Star mission operated alongside Cluster II from 2004 to 2007.
David Spergel
David Nathaniel Spergel (born March 25, 1961), is an American theoretical astrophysicist and Princeton University professor known for his work on the WMAP (Wilkinson Microwave Anisotropy Probe) mission.
 Spergel is a MacArthur Fellow.
 He is a member of the NASA Advisory Council and is chair of the Space Studies Board.
 He was once the W.M. Keck distinguished visiting professor at the Institute for Advanced Study in Princeton, New Jersey.
 He was part of the team that originated the WMAP mission and designed the spacecraft, and has worked on deciphering the data that it beams back from space.
 Spergel is playing a leading role in developing the WFIRST(Wide Field Infrared Space Telescope), a multibillion-dollar space mission planned for launch in the mid-2020s.
 Spergel is the Charles A Young Professor of Astronomy and a member of the National Academy of Sciences.
 Spergel is the Founding Director of the Center for Computational Astrophysics.
 He
Onizuka Prop Wash Award
The Onizuka Prop Wash Award recognizes the student at the United States Air Force Test Pilot School (USAF TPS) who contributed most to class spirit and morale.
 The honoree from each class is selected by his or her fellow students rather than by school faculty.
 The award is named in memory of TPS graduate Ellison Onizuka who perished in the explosion of the Space Shuttle "Challenger" in 1986.
Double Star (satellite)
Double Star is a joint satellite based space mission by the China National Space Administration (CNSA) and the European Space Agency (ESA).
 It is the first space mission launched by China to investigate Earth's magnetosphere.
 It consists of two satellites: an Equatorial satellite (TC-1) and Polar satellite (TC-2).
 Double Star follows in the footsteps of ESA's Cluster mission by studying the effects of the Sun on the Earth's environment.
 After a nominal mission of one year (from the launch of TC-2 in July 2004), the Double Star mission was extended twice by both agencies till the end of September 2007.
Don Quijote (spacecraft)
Don Quijote is a past space probe concept that has been studied by the European Space Agency, and which would investigate the effects of crashing a spacecraft into an asteroid.
 The mission was intended to test whether a spacecraft could successfully deflect an asteroid on a collision course with Earth.
 The orbiter was designed to last for seven years.
 The mission did not proceed beyond initial studies, currently ESA is working on Asteroid Impact & Deflection Assessment mission as a part of its NEO space mission studies.
Euclid (spacecraft)
Euclid (named after the ancient Greek mathematician Euclid of Alexandria, the "Father of Geometry"), is a space mission currently under development by the European Space Agency (ESA).
 The objective of Euclid is to better understand dark energy and dark matter by accurately measuring the acceleration of the universe.
 To achieve this, the spacecraft will measure the redshift of galaxies at varying distances from Earth and investigate the relationship between distance and redshift.
 Dark energy is generally accepted as contributing to the increased acceleration of the expanding universe, so understanding this relationship will help to refine how physicists and astrophysicists understand it.
 Euclid's mission advances and complements ESA's Planck mission, and other contemporary space missions.
Mission patch
A mission patch is a cloth reproduction of a spaceflight mission emblem worn by astronauts and other personnel affiliated with that mission.
 It is usually executed as an embroidered patch.
 The term space patch is mostly applied to an emblem designed for a manned space mission.
 Traditionally, the patch is worn on the space suit that astronauts and cosmonauts wear when launched into space.
 Mission patches have been adopted by the crew and personnel of many other space ventures, public and private.

Answer: STS-51-L