CSA Tweetup group - Last shuttle launch - Mission STS-135

2011-07-08 - Mission STS-135 marks a turning point in space history as Shuttle Atlantis performs the last flight of the Space Shuttle Program. To highlight this historic event, the CSA hosted a Tweetup activity for 32 of its Twitter followers on July 8 at CSA HQ in Saint-Hubert, Quebec. This group picture was taken in the Mars Emulation Terrain behind the CSA. (Credit: Canadian Space Agency)