Pentagon Force Protection Agency Sgt. Isaac Hoopii poses with his present-day canine assistant, Marko, at the Pentagon Memorial, Aug. 28, 2008. During 9/11, Hoopii assisted injured people and pulled security sweeps at the stricken Pentagon with his German shepherd bomb-detection dog, Vito, who since has retired from duty. Defense Dept. photo by Gerry J. Gilmore Pentagon Force Protection Agency Sgt. Isaac Hoopii poses with his present-day canine assistant, Marko, at the Pentagon Memorial, Aug. 28, 2008. During 9/11, Hoopii assisted injured people and pulled security sweeps at the stricken Pentagon with his German shepherd bomb-detection dog, Vito, who since has retired from duty. Defense Dept. photo by Gerry J. Gilmore SHARE: Download: Full Size (0.29 MB) Credit: VIRIN: 299694-W-DCJ54-825.jpg Photo Gallery