Nation A museum displayed a WWII-era grenade for 2 years. It may have been live the whole time. March 17, 2020 Ryan W. Miller, USA TODAY Comments Off on A museum displayed a WWII-era grenade for 2 years. It may have been live the whole time. The Eisenhower National Historic Site said in a new release that a Mark II Fragmentation Grenade with a M10A3 Fuse was destroyed off site last month.