Exercise Locked Shields Service members man the operations center for Exercise Locked Shields 21, Morgantown, W. Va., April 14, 2021. They competed against 21 other Blue Teams across the globe. The exercise is the world's largest cyber defense exercise with more than 30 nations participating this year. SHARE: Download: Full Size (3.28 MB) Credit: Army Chief Warrant Officer 2 Jeremiah Bennett VIRIN: 210414-Z-F3921-001M.JPG Photo Gallery