One of the many recommendations in the President’s Review Group report on the NSA surveillance programs released last month was for the review of MLATs, or Mutual Legal Assistance Treaties. This was the second time that MLATs made the news in December: at the beginning of the month, eight major internet companies issued a series of principles for reforming government surveillance that including improving the MLAT system. Clearly MLATs are an issue, but what does this four-letter word mean, and why are they so desperately in need of reform?…