The deaths of Ambassador Christopher Stevens and three other U.S. personnel in Benghazi, Libya, on 11 September 2012, along with attacks on U.S. embassies in Egypt, Sudan, Tunisia, and Yemen, have drawn renewed attention to the challenges facing U.S. diplomats abroad, as well as to the difficulty in balancing concerns for their security against the outreach required of their mission. Congress plays a key role in shaping the response to these challenges, such as by providing resources for diplomatic security and examining security breaches overseas. The inability to provide perfect security, especially against the evident threat of mob violence, has focused particular scrutiny on the deployment of diplomatic personnel in high-threat environments. This book provides background information on the authorities, regulations, and procedures in place at the Department of State regarding diplomatic security with additional discussion on embassy security funding trends.