NASA ’Flares’ Up for SLS

Sparks fly as a hydrogen burn-off igniter test is conducted May 5 at the Redstone Test Center on Redstone Arsenal in Huntsville. The igniters will be used for NASA’s Space Launch System to burn off any free hydrogen that can potentially collect at the aft of the rocket about 10 seconds before liftoff. SLS will be the most powerful launch vehicle ever built for deep space missions, including to an asteroid and ultimately to Mars. (RTC)