Spc. Tiffany Knotts, a native of Riverside, Calif., who serves as a Stryker driver assigned to the 556th Signal Company, 2nd Stryker Brigade Combat Team "Warrior," 25th Infantry Division, Multi-National Division – Baghdad, stands on top of the engine block while performing her weekly preventative maintenance check and services on her Stryker vehicle, Oct. 13, 2008, at Camp Taji, northwest of Baghdad. Knotts is the first and only woman Stryker driver in the Army.