Exelon Nuclear Security LLC did not violate the Americans with Disabilities Act when it terminated an employee who was forced by stress to stop working as an armed security guard, a federal judge held Tuesday.In a written opinion, U.S. District Judge Jorge L. Alonso granted summary judgment in favor of Exelon in a lawsuit brought by Beth Gunty.Alonso acknowledged the ADA requires employers to make reasonable accommodations that will allow disabled employees to continue working.A reasonable accommodation can take the form …