The potential disadvantages include: 1) Required to travel to one’s home country on short notice in order to complete an interview at the U.S. Embassy or U.S. Consulate; 2) Need for police clearances from each country lived in for six months or more since turning 16 years of age (for a limited number of countries this is waived); 3) Completion of a medical exam in the home country and potential delays encountered in waiting for those results to be transmitted to the U.S. Embassy or U.S. Consulate; 4) No right to legal counsel at the interview at the U.S. Embassy or U.S. Consulate and limited opportunity to challenge a denial; 5) Applicants cannot secure an Employment Authorization Document (EAD) or an Advance Parole (AP) document while waiting in the U.S. to complete the green card process; and Applicants cannot benefit from AC-21 portability in the event his or her position, job location or employer changes.