Michael "Mikey" Weinstein, a 1977 graduate of the Air Force Academy, filed suit against the Air Force in federal court in Albuquerque in October. Weinstein and four other plaintiffs allege illegal proselytizing by evangelical Christian chaplains, officers and cadets at the Air Force Academy and throughout the service.

The plaintiffs -- including one of Weinstein's sons who is an Air Force officer -- filed a motion Thursday to amend the lawsuit, challenging the Air Force's "interim guidelines" on religious expression issued last month. The latest filing seeks to add another plaintiff, Master Sgt. Phillip Burleigh of Alamogordo, N.M., a 24-year veteran. It alleges that Burleigh, an Air Force Reserve recruiter at Holloman Air Force Base, "has been subjected to regular and persistent proselytizing by his superior officers" against his will and "in violation of his constitutional rights."