In May 2013, the Bureau of Justice (BJA), in partnership with the CNA Corporation, developed Managing Large-Scale Security Events: A Planning Primer for Local Law Enforcement Agencies (Planning Primer) to help guide local governments as they prepare for large-scale security events. BJA requested assistance in updating the Planning Primer based on the planning of the 2016 Republican National Convention in Cleveland, Ohio on July 18 - 21, 2016 and the 2016 Democratic National Convention in Philadelphia, Pennsylvania on July 25 - 28, 2016.