Main Page | See live article | Alphabetical index Astronaut Clifton Williams was killed on October 5, 1967 after a mechanical failure caused his controls to stop responding. He had been assigned to the back-up crew for what would be the Apollo 9 mission and would have most likely been assigned as Lunar Module pilot for Apollo 12. The Apollo 12 mission patch has four stars on it - one each for the three astronauts who flew the mission, and one for Williams. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.