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Spectators watch the static test of an engineering test motor for the Space Shuttle's Solid Rocket Booster - managed by NASA's Marshall Space Flight Center in Huntsville, Ala. The engine fired for 123.1 seconds Thursday, Nov. 1, at the Promontory, Utah, facility of ATK Thiokol Propulsion, an Alliant Techsystems Inc., company. An engineering test motor offers the opportunity to spot any flaws, as well as to conduct "push-the-envelope" testing to gauge the components' ability to meet flight requirements. The test simulates many of the conditions that would be experienced in flight.
Credit: Thiokol
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