Army Sgt. 1st Class Michael Deblock, Vermont Army National Guard Computer Network Defense Team, left, discusses new ways to make the exercise more challenging for cyber defenders with a fellow Red Cell team member during the 2014 Cyber Shield exercise at the National Guard Professional Education Center, North Little Rock, Ark., April 29, 2014. U.S. Army photo by Staff Sgt. Kelvin Green Army Sgt. 1st Class Michael Deblock, Vermont Army National Guard Computer Network Defense Team, left, discusses new ways to make the exercise more challenging for cyber defenders with a fellow Red Cell team member during the 2014 Cyber Shield exercise at the National Guard Professional Education Center, North Little Rock, Ark., April 29, 2014. U.S. Army photo by Staff Sgt. Kelvin Green SHARE: Download: Full Size (13.31 MB) Credit: VIRIN: 757824-U-MEU26-777.jpg Photo Gallery