In America, the Juris Doctor program is usually both the first and final degree in law. Post-J.D. degrees (such as the LL.M., S.J.D., and their equivalents) are supplementary programs where foreign jurists can capitalize on, their own backgrounds in the study of American law.
the U.S. Juris Doctor (JD)
U.S. educational institutions have given foreign nationals extensive exposure to U.S. laws and ideas about law. Probably the most significant elements in this process are the burgeoning LL.M. programs at U.S. law schools. Many among the top tiers of U.S. law schools have provided these one-year graduate study programs for young and mid-career lawyers from around the world. LL.M. programs typically include a basic course that provides an introduction to U.S. law for foreign students, and several more specialized elective courses, most of which typically focus on some field of U.S. law and include both foreign LL.M. students and American J.D. students.