Although unknown to the general population, there actually was a "World War 3." The fact that it only lasted 4 and a half seconds is why it's so unheard of. It happened about 2 years ago on October 2nd at 4:13am but ended shortly after when the United States sent Chuck Norris behind enemy lines in Mexico, France, and Iraq. The only reason it took him 4 and half seconds to drop 3 countries is the fact that he stopped for lunch in the middle of it.
(Son) "Dad, do you think World War 3 will happen in my lifetime?"
(Dad) "It already has son, it already has..."