Over the years, the Leahy law has been applied to many countries, and secretaries of state and defense of both political parties have affirmed its importance as a practical and effective tool to shield the United States from involvement in horrific crimes and to build forces that respect human rights and the laws of armed conflict. But while the Leahy law applies the same requirements to every country, it has not always been equally enforced. Israel, among the largest recipients of U.S. military aid, is a glaring example.