IF MARGARETHE CAMMERMEYER WERE a heroine in a fictional TV movie of the week, critics might chide the writers for inventing a character so hyperbolically resolute. After all, how believable is a venerated female Army colonel who raises four fine sons, runs a seizure clinic, attains a doctorate in nursing at 49, and then makes a career of challenging the military's antigay policy?
Cammermeyer, of course, is not the creation of a high-minded television dramatist. She is the very real, intensely ambitious Army nurse dismissed from the military in 1992 after revealing that she was a lesbian. Serving in Silence, an...