*cough* Al Qaeda *cough*
Probably not. The US hosts a lot of foreign military personnel from hither and yon. Their military vets them, then the Pentagon vets the heck out of them, and has since the 1980s.
Most are from NATO countries, but at least there used to be a lot of Egyptians, essential for the Bright Star maneuvers in Egypt every few years, as well as Jordanians, South Koreans, Australians, etc., etc. When the Soviet Union fell, they were probably up to their eyebrows with eastern Europeans, desperate to make US friendships.
This has paid off as well. Both Iran and Afghanistan have at times been filled with friendly nations wanting in on a major US operation.