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.
The passport card cannot be used for international air travel. Applications have been accepted since February 1, 2008; production of the cards began July 14, 2008. By the end of 2015, more than 10 million Passport Cards have been issued to U.S. citizens. The card is manufactured by L-1 Identity Solutions. National identity cards with similar utility are common inside the European Union for both national and international use.