In today's fast-paced world of overseas contingency and domestic operations, commanders rely on the advice of JAG Corps personnel to make critical decisions, sometimes involving life and death. Demand for this advice is high and will likely increase. The complexity of the operational environment is also growing. We can be sure that technological advances on the 21st Century battlefield will take us into uncharted legal territory, where we will be expected to analyze the complexities and provide accurate advice faster than ever before. Our ability to do so will have a direct impact on America's capacity to effectively project power across the spectrum of conflict. Commanders count on legal teams knowledgeable in subjects ranging from weapon selection and target engagement to nation building and counterinsurgency activities. That's why the second edition of the Air Force Operations & the Law: a Guide for Air & Space Forces is so important.