This still from an ATK webcast shows a side view of the five-segment solid rocket booster DM3 during a Sept. 8, 2011 static test firing at the company's motor proving grounds near Promontory, Utah.
CREDIT: ATK
A full-scale test of the world's largest solid rocket motor, which was originally envisioned to power a new NASA rocket, went off without a hitch in Utah's high desert today (Sept. 8).
Built by Utah-based Alliant Techsystems (ATK), the five-segment solid motor ignited just after 4 p.m. EDT (2000 GMT) in a fiery burst followed by two minutes of a deafening roar. The test, called Development Motor 3 (DM3), shook the desert and surrounding mountains and sent massive columns of smoke billowing into the clear blue sky above.
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