well thats a hard on.... um er, Cuban Missile Crisis goes red hot, the USA gets nailed by 20+ nukes, the Russians and the Cubans are nuked flat 90% die out in the USSR and 99% death in Cuba, the Americans pull in forces from around the world, Racism and anti-foreign feeling spike as Europeans condemn the US's heavy handed attack on the USA and Latin American nations for the Attack on Cuba, non-Americans are kicked out and the borders close up tight, Alaska and Hawaii find themselves largely cut off from Federal dollars and both states suffer greatly, the US pulls out of Puerto Rico in 1965 due to strong anti-latin feeling in the main-land "just a bunch of Cubans stuck on another island" Puerto Rico struggles greatly, by 1980 a Communist coup rocks the Island and takes over, most Americans don't give a damn.