Secretary of Defense Cohen addresses soldiers of the U.S. Army 6th Cavalry Brigade. Secretary of Defense William Cohen addresses soldiers of the U.S. Army 6th Cavalry Brigade based at Camp Humphreys, Republic of Korea, on Jan. 14, 1999. Cohen is visiting the base as part of a five-day trip to Japan and the Republic of Korea. The 6th Cavalry operates the AH-64 Apache attack helicopter. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 058364-L-UXE68-889.jpg Photo Gallery