Merkel, Trump, and Putin are at a military inspection

They are standing at a dock. Trump points at an American submarine: “Our American submarines are so well-made, they can last half a year under water without having to resurface a single time in-between!”. Putin shows himself unimpressed and points at a Russian submarine: “That’s nothing, our Russian submarines can stay under water for a whole year, without resurfacing a single time!”. They turn to Merkel, who did not bring a submarine that day “What about you, Angela?”.Suddenly, the water starts to bubble and slowly an ancient-looking submarine emerges from below the surface. The hatch opens, and a really old man with a long white beard comes out wearing a ragged-looking uniform, raises his right hand and shouts: “HEIL HITLER, WE’VE RUN OUT OF ZE DIESEL!”