During the past three days, key military computer installations of every major world power have reported security failures. In each case, someone gained access to a primary missile attack computer. Only one person is capable of computer tampering on this scale - Professor Elvin Atombender.
Using a fortune he amassed by raiding the computer systems of various financial institutions, Professor Elvin Atombender constructed a vast, underground stronghold packed with computer equipment. There, in seclusion, Elvin spent four years working to breach the security of military computer installations around the world. As you know, he has succeeded.
Our computer estimates that he will break the launch codes and trigger a missile attack that will destroy the world in exactly six hours. This is the amount of time you will have to complete you mission.