Griffin Grenade A U.S. soldier throws a smoke grenade during a combined arms live-fire exercise as part of Griffin Shock 23 at Bemowo Piskie, Poland, May 16, 2023. Griffin Shock aims to demonstrate the U.S. Army's ability to rapidly reinforce NATO Battle Group Poland to a brigade-size unit. SHARE: Download: Full Size (0.66 MB) Tags: army, nato, griffin shock 23 Credit: Army National Guard Staff Sgt. Agustín Montañez VIRIN: 230516-Z-XG945-1466.JPG Photo Gallery