Case Computer JFK

Case Computer JFK is the story of a high tech computer wrongly sold to a member of the public.
The problems really start when the man's nephew comes round to visit with his three friends, they have a new found interest in the JFK assassination.
They use the new computer unaware of what will happen when they click on a picture associated with the JFK assassination. The computer makes the room hazy before throwing them all back to two days before the assassination takes place.
They find themselves in Dallas, Texas on November 21st 1963. They know what's going to happen, but will anyone believe four teenagers from the future?