Little attention and analysis have focused on terrorism victims, including survivors. This report focuses on the organized groups of families and friends that have emerged since September 11, 2001, to become a powerful voice in U.S. counterterrorist policy and legislation. These groups were remarkably successful in getting the 9/11 Commission established as well as the enactment of the commission?s most important recommendations. This report documents these groups? number and diversity, their wide disparity in mission and services, in addition to the effectiveness of their strategies for achieving their missions. It also compares the 9/11 victims? groups to those formed in response to previous terrorist attacks both in the United States and abroad, highlighting the lessons the 9/11 groups learned from these precedents and the differences between 9/11 groups and those that preceded them.