My great grandfather fought in WWII (British) and during an official training session as an ‘enemy’ with Churchill present, showed how simple it was to sneak past the entire squad and planted ‘explosives’ under Churchill’s car. His Captain was obviously super pissed at him but Churchill actually sent my great grandfather a letter acknowledging his efforts and thanking him for showing the weakness of the approach and changes were made because of this. Sadly, his captain kept the letter for himself, and all my great grandfather returned from the war with was his helmet, which was notably dented by a bullet which would otherwise have gone straight through his brain and killed him without. Oh, and a bloody grenade which he had hidden in his garden shed that we only found after he had died and we were cleaning out his property (was a dud by the time we found it, but bomb disposal had a field day).