Janine Suppes put it plainly. "My own husband will not be re-enlisting," she said. Glen Suppes, a Hotchkiss high school teacher, father of three and a Colorado National Guardsman, has been gone for 14 months, in Iraq for 10, with two more months to go. When he comes home, he will join a growing number of military reservists and National Guard soldiers who will leave the service when their enlistments are up. "Mass exodus. That's the term that keeps going around," said Janine Suppes. So far, at least, an exodus is not reflected in the numbers. Nationally, officials say that...