FORT POLK, La., July 15, 2009 – Don't blame the soldiers here if you see them do a double take when two of the unit's newest captains pass by. Levi Lyles, foreground, pins captain bars on his son, Derrick Lyles, while Lisa Lyles, background, pins captain bars on her husband and Derrick's twin brother, Darrell Lyles, during a promotion ceremony on Fort Polk, La. July 1, 2009. U.S. Army photo by Chuck Cannon (Click photo for screen-resolution image);high-resolution image available. Despite appearances, the soldiers of 10th Mountain Division’s 94th Brigade Support Battalion, 4th Brigade Combat Team are not seeing double --...