Smoke Grenade Three soldiers in the 2021 Best Warrior Competition use a smoke grenade to conceal their movement as they prepare to capture a high value target during a military operation in urban terrain event at Camp Navajo, Ariz., March 4, 2021. SHARE: Download: Full Size (5.02 MB) Tags: Army Credit: Army Spc. Carlos Parra VIRIN: 210304-A-PV404-385.JPG Photo Gallery