ATK hosts #DM3 Tweetup for 5-segment motor ground test in Utah

Can’t make it to GRAIL? Attend the #DM3 tweetup for the  five-segment ground test at Promontory, Utah, September 8. Send a DM to @ATKRocketNews or @ATKOutreach on Twitter if you’re interested in tweeting live from the Utah desert. Click here to learn more about the ground test.