-Scientist: "Mr. President, we've detected an incoming alien fleet!"
-General: "How many ships? How long until they get here? Mr. President, we need to go to Defcon 2!"
-Scientist: "Actually...they're invading the asteroid belt."
-President: "The asteroid belt? Why aren't they coming to Earth? Wouldn't they want to steal our water or something?"
-Scientist: "There's a lot more of everything they'd want out there in space. We did try to contact them and open negotiations. As near as we can tell, their return transmission translates as, 'Sure, there's plenty to go around...if you ever get out of that gravity well in time. Hehehehe. Suckers.'"