If you're a recent law school graduate, it might not be a bad idea to get a few years of experience under your belt before looking to expatriate. I'm a CPA/MBA and found that for overseas jobs, it's easier to sell your experience on the job than your academic credentials (which may or may not transfer or be completely understood overseas).

For Africa or the Middle East, you may want to look into getting some NGO experience, or think about working for international companies that have dealings with Africa and the Middle East (oil and energy companies, large construction or engineering companies). A few years stateside could lead fairly quickly to an overseas transfer - especially if you have a language or two that would come in handy (French, Arabic).