How is it that a major technical facility with over 20,000 employees had to rely on a valet parking attendant carrying a concealed gun to stop a woman from being stabbed to death?  Doesn t this raise questions about how well prepared a major company like GM is for a possible terror attack? Where were the security guards? Are they even allowed to be armed?Police are investigating after a woman was stabbed at the General Motors Technical Center in Warren, Mayor Jim Fouts confirmed to FOX 2.Fouts tells us a woman walked into the 8-story building at the center of the campus and asked to speak with a female employee. The two met in the lobby and started talking but stepped outside when their conversation escalated.It was outside that the visitor pulled out a knife and started stabbing the employee in the neck, back and abdomen several times, Fouts says. The stabbing was broken up by a valet driver who was carrying a concealed weapon.The employee was taken to the hospital and we re told she is in critical. The suspect is in custody at this time. We re told the suspect is not cooperating with police as they are trying to determined how the two women knew each other.Via: FOX 2 Detroit