Major Nidal Hasan and the Fort Hood Tragedy: Implications for the U.S. Armed Forces by Clint Watts, Foreign Policy Research Institute. From the Introduction:
Major Nidal Hasan's killing of his fellow soldiers at Ft. Hood, Texas undermines the common trust binding America's all-volunteer, multi-ethnic military force. Hasan's violence forces all service personnel to take an introspective look at their organization and persistently assess the possibility of extremists in their ranks. After Hasan's attack, many questioned the U.S. military's ability to recruit, train and retain Muslim military members without exposing service members to violent extremism. Unfortunately, Hasan's violence against fellow soldiers and fellow Americans is not unique. Recent history offers repeated examples of current or former military members conducting violent attacks in support of many different extremist causes. To ensure the integrity and safety of the all-volunteer force, the U.S. military needs a structured approach to assessing and mitigating the threat of lone-wolf extremists in the ranks.
Read the full FPRI E-Note: Major Nidal Hasan and the Fort Hood Tragedy: Implications for the U.S. Armed Forces