Czechoslovaks Jozef Gabcik and Jan Kubis, trained in Britain by SOE, parachuted into their occupied homeland to assassinate Reinhard Heydrich — the third most powerful man in Nazi Germany and architect of the Holocaust. They ambushed Heydrich's open car on a Prague street corner. When Gabcik's submachine gun jammed, Kubis threw an anti-tank grenade that wounded Heydrich through the car's floor. Heydrich died of sepsis from the wounds eight days later. In retaliation, the Nazis destroyed the village of Lidice, executing all 172 men and older boys and sending women and children to concentration camps. Gabcik, Kubis and their helpers were found in the Church of Sts Cyril and Methodius after a traitor revealed their hiding place; they fought a two-hour gun battle before taking their own lives.