It's the 4th of July and the nation is set for a mighty celebration. Into the comparent calm of the White House bursts the manic Dr. Megalomann. "Step down, Mr. President, submit to my rule or today America will know a plague from which death will seem a happy release!" "Hi, kids. Captain America here. No time to lose. The CIA says there's an unidentified missile located in an underground silo in the middle of the Californian desert. Must be the one! Climb aboard the Sky Cycle. Together we can save the free world! God save America!"