Marines with Alpha Company, 1st Battalion, 7th Marine Regiment, review a terrain model before conducting a live fire exercise on Range 210 at Marine Corps Air Ground Combat Center Twentynine Palms, Dec. 6, 2013. The facility resembles an urban environment and is unique because its buildings' walls are constructed of shock-absorbent concrete. Unlike a majority of urban training facilities, Marines are able to conduct live fire training versus firing blank ammunition.