This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
april april robertcrippen francisscobee gerogenelson jamesvanhoften terryhart challenger stsc stsc round white background Launch April Landing April Edwards Air Force Base Cal. Astronauts Robert L. Crippen Francis R. Scobee Geroge D. Nelson James D. A. Van Hoften and Terry J. Hart Space Shuttle Challenger The first direct ascent