Islamic Terrorist Sleeper Cells?

Family Security Matters has an article on the dangers of using terms such as "moderate Islam" versus "radical Islam," arguing that the real distinction is between "non-practicing Muslim" versus "practicing Muslim." However, there is also this bit:

In the U.S. our military bases have programs to bring citizens/scientists from Islamic based countries to the U.S. to train them on many of our weapons systems and some of our most highly guarded technology systems. This must stop. Kirtland AFB, NM and Wright Patterson AFB, Ohio are two of the top offenders. Intelligence that would not be provided to the American public is freely provided to foreign nationals from Islamic based countries that support terrorism against us. In addition thousands of foreigners from Islamic based countries are trained at our military bases about aircraft systems and how to fly them. Lackland AFB, Texas is one of our prime offenders in this category. When I was a Special Agent for the Air Force Office of Special Investigations we continuously had open cases on foreign citizens who suddenly left our installations and disappeared into unknown areas of America. I have written previously about ‘sleeper cells'. These are some of the people who go underground into sleeper cells. They are trained military personnel who have a working knowledge of English and have been trained on our weapons systems. Immediately after the attack on 9-11, other Agents and myself were given orders to attempt to track these ‘lost' foreigners down. It was an impossible hunt. There was a major concern some of the 9-11 Islamic hijackers had even trained in our military flight schools.