The Berlin Wall Guard A guard stood in the East crossing of the Berlin Wall when he is approached by a man on a bicycle, carrying a suitcase. ""Before I let you cross, I need to check what's inside your suitcase,"" the guard says, and takes the suitcase. He puts on his gloves, and opens the case for examination only to find that the case is filled with sand. He sifts through the sand but cannot find anything else, so he closes the suitcase, hands it back and lets the man through. A couple of wee…