If the city of Denver is attacked with chemical or biological weapons, doctors at one Denver hospital may be the first to figure it out. Denver Health Medical Center is part of a program called "syndromic surveillance."  "We would have a potential 12 or even 24 hour leeway ahead of what we would normally have waiting for cultures and those types of things, to try to react," said Dr. Chris Colwell of Denver Health Medical Center. The program is designed to alert emergency room doctors at the hospital if an unusual number of patients come in seeking treatment for the same symptoms. The program is still in the test phase. Test programs are also taking place in Iowa and Massachusetts as well.