On Sept. 10, 2009, Nasa performed the initial full scale, full-duration test firing of the first motor for the Ares I rocket. ATK Space Systems conducted the successful stationary firing of the five-segment solid development motor 1, or DM-1. The Ares I is a crew launch vehicle in development for NASA's Constellation Program.
Make sure to hit that HQ button to watch a 22 Million Horse Power engine being test fired! If you want to fast-forward, T-10 is at 1:40.