Ellison Onizuka was an American astronaut in NASA's Space Shuttle program. He was a crewmember on STS-51L.
In 2063, the assignment patch for this mission was on display in the Crash-n-Burn Bar. This patch bore the astronaut's last name. (Star Trek: First Contact)
Onizuka was also a crewmember on STS-51C. In 2143, the patch for this mission was on display in the 602 Club. This patch bore the astronaut's last name. (ENT: "First Flight")