The Commission to Assess the Threat to United States from Electromagnetic Pulse (EMP) Attack has released their latest and it can be found along with related information at their website -- http://www.empcommission.org/index.php
Report of the Commission to Assess the Threat to United States from Electromagnetic Pulse (EMP) Attack: Critical National Infrastructure can be found at http://www.empcommission.org/docs/A2473-EMP_Commission-7MB.pdf
The EMP Commission was established as part of the National Defense Authorization Act for FY2001 and "reestablished via the National Defense Authorization Act for Fiscal Year 2006 to continue its efforts to monitor, investigate, make recommendations, and report to Congress on the evolving threat to the United States from electromagnetic pulse attack resulting from the detonation of a nuclear weapon or weapons at high altitude."
Duties of the EMP Commission include assessing:
1. the nature and magnitude of potential high-altitude EMP threats
to the United States from all potentially hostile states or non-state actors that have or could acquire nuclear weapons and ballistic missiles enabling them to perform a high-altitude EMP attack against the United States within the next 15 years;
2. the vulnerability of United States military and especially
civilian systems to an EMP attack, giving special attention to vulnerability of the civilian infrastructure as a matter of emergency preparedness;
3. the capability of the United States to repair and recover from
damage inflicted on United States military and civilian systems by an EMP attack; and
4. the feasibility and cost of hardening select military and
civilian systems against EMP attack.