Staff Sgt. Elizabeth Callahan competes in her fourth Olympics. U.S. Army Reserve Staff Sgt. Elizabeth Callahan competes in her fourth Olympics in the women's 25-meter sport pistol event during the 2008 Olympic Games in Beijing, China, on Aug. 13, 2008. SHARE IMAGE: Download Image: Full Size (0.06 MB) Photo By: VIRIN: 048714-O-MBZ78-583.jpg Photo Gallery