The United States needs a new framework for partnering with security forces overseas. Since 9/11, it has spent more than $250 billion building up foreign military and police. But that hasn't always left the United States safer or its partners more stable and capable. From attempts to build whole armies in Iraq and Afghanistan, to efforts to help Yemen or Nigeria fight terrorism, the overall return on investment has been poor. This document sets out immediate, concrete steps the incoming administration can take to make American security sector assistance more accountable to the taxpayer and more effective. That is, to transform it from a confusing and inefficient web of U.S. government actors and interests into a more selective, transparent, goal-driven, and coordinated process that is matched to broader U.S. foreign policy objectives.