Alright, I'm looking for a sci-fi post-apocalyptic novel I read in Middle School, not sure if it was written for young adults. It probably had a year for its title.
The plot revolved around three children, a normal teenage male, a teenage female, and a short young boy who was intelligent for his age. The teenage male had an internal clock and always knew what time it was no matter where he was. They lived in a domed city, the remains of America, and they were specially chosen, possibly bred, to fight for the nation against other nations in a serious of virtual reality cyberspace war simulations. To enter into the virtual world, the kids would each sit in special pods that filled with a special liquid you could breathe instead of oxygen.
What is the name of this story?