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The Mars Flag was flown on STS-103 to HST, and not on a mission where Scott Horowitz participated.

See CNN article:

 
http://archives.cnn.com/2000/TECH/space/01/07/mars.flag/

Or SpaceRef article:

 
http://www.spaceref.com/news/viewpr.html?pid=428

The mission referenced by the articles is STS-103.

The astronaut who carried the flag is actually John Mace Grunsfeld. —The preceding unsigned comment was added by Sandrot ( talk • contribs) 22:10, 30 April 2007 (UTC). reply

Horowitz has announced (by email) that he is departing NASA again, effective about the end of FY07, but I have not added this to the article since I didn't have a reputable reference. Since I will doubtless forget to add it when it becomes official, I wanted to flag someone to make the change. -- Pawl 15:30, 12 July 2007 (UTC) reply