Master Sgt. Alex Barros (left), a project officer in Marine Corps Systems Command’s Expeditionary Power Systems, discusses plans on a 60-by-40-foot map during the ceremonial rehearsal of concept drill at the National Guard Armory in Washington, D.C., Dec. 14. Barros was selected in October to serve on the Joint Task Force-National Capital Region, which was assembled to support the 58th Presidential Inauguration. On Jan. 20, more than 5,000 service members will participate in the inauguration ceremonies and other events. (U.S. Army photo by Spc. L'Erin Wynn) - Master Sgt. Alex Barros (left), a project officer in Marine Corps Systems Command’s Expeditionary Power Systems, discusses plans on a 60-by-40-foot map during the ceremonial rehearsal of concept drill at the National Guard Armory in Washington, D.C., Dec. 14. Barros was selected in October to serve on the Joint Task Force-National Capital Region, which was assembled to support the 58th Presidential Inauguration. On Jan. 20, more than 5,000 service members will participate in the inauguration ceremonies and other events. (U.S. Army photo by Spc. L'Erin Wynn)