The US has not been attacked by nuclear weapons from anyone!

This is a secret US test on a small town, Jericho in this case, to see how Americans will respond if a nuclear attack were to happen. The entire town has been led to believe there was a nuclear attack and the government is doing things so the towns people believe it to be seem real....i.e., flying over with foreign aircraft, causing artificial EMP's and cutting off Jericho from any outside communication.

There is a Twilight Zone episode (can't remember the number or title) which has a similar story line...I encourage you to watch it and notice the similarities between it and Jericho. Notice how the Twilight Zone episode ends......this is how Jericho will end as well!