Enlisted Marine Corps ranks are broken down into three levels, Junior Enlisted, Non-Commissioned Officers, and Staff Non-Commissioned Officers. As a Marine moves up the ladder his or her responsibility and contribution to the mission increases.
Also, children born abroad to two non-citizen nationals or to one alien parent and one non-citizen national parent are eligible for non-citizen national status. This is so rare that the State Department does not even issue a certificate for it. Non-citizen nationals are delineated as such in their passports.
Non American citizens applying for a Schengen visa, while in US. All non US citizens who do need a visa to enter the Schengen Area, must have a U.S. visa or a Permanent Residence Card with three (3) months validity after returning from the Schengen area. If your US visa has expired, please have it renewed before applying.