NASA July 4, 1997: Sojourner Arrives on the Red Planet Hitching a ride on the Mars Pathfinder mission, the Sojourner rover arrived on Mars on July 4, 1997. via NASA http://www.nasa.gov/image-feature/july-4-1997-sojourner-arrives-on-the-red-planet Share this:TweetEmailPrintPocketLike Loading... Related