These men, several of them centenarians by now, have built a giant tower which emits an electromagnetic pulse, disabling any approaching aircraft and disrupting radio communications, so they never got the news that the war was over.
These men have built a giant tower. This giant tower emits an electromagnetic pulse. These men were disabling any approaching aircraft. These men were disrupting radio communications. These men are several of them centenarians by now. The war was over. They never got the news this.