JFK was intitally worried that the Russians would steal the plans for the stadium so he decided to keep them on person until he can take them personally to the top secret government vault buried deep in the hills of Colorado Springs. Inside the vault are other plans like the perpetual motion machine and engine that runs on water, basically anything that could be deemed distasterous to society. His plan was to take them to Colorado Springs after a layover in Dallas.
On Friday, November 22, 1963, in Dallas, Texas at 12.30pm JFK was fatally wounded by gunshots while riding with his wife in a motorcade. In the ensuing chaos the plans went missing and were undiscovered until recently.