U.S. Army Spc. Andrew Harvey trudges across the steep cliff sides surrounding Korengal Valley, Afghanistan, during Operation Viper Shake, April 21, 2009. During the operation, soldiers from the 1st Infantry Division's Company C, 1st Battalion, 26th Infantry Regiment, hiked to elevations of more than 2,500 meters to disrupt violent extremists operating in one of Afghanistan’s most hostile areas. U.S. Army Spc. Andrew Harvey trudges across the steep cliff sides surrounding Korengal Valley, Afghanistan, during Operation Viper Shake, April 21, 2009. During the operation, soldiers from the 1st Infantry Division's Company C, 1st Battalion, 26th Infantry Regiment, hiked to elevations of more than 2,500 meters to disrupt violent extremists operating in one of Afghanistan’s most hostile areas. SHARE: Download: Full Size (1.43 MB) Tags: Photo Essays Credit: VIRIN: 103326-G-NKT76-598.jpg Photo Gallery