Sgt. Tiffany Hunter of Schofield Barracks, Hawaii, Sgt. Michael Polmanteer of Fort Wainwright, Alaska, Spc. Kelly Gregg of Fort Bliss, Texas, and Iowa Army National Guard Spc. Alexander Rebling sing during the 2013 U.S. Army Soldier Show's "Ready and Resilient" performance, April 21, 2013, at Fort Sam Houston Theatre on Joint Base San Antonio-Fort Sam Houston, Texas.