Cyber Atlantic 2011
Cyber Atlantic 2011 was the first joint cyber security exercise between member states of the European Union and the United States. In the exercise both sides simulated a cyber-crisis scenario to explore EU-US engagement and cooperation in the event of cyber-attacks on their critical infrastructures. Standard Operating Procedures were introduced and tested!
Read the exercise evaluation report here - http://www.enisa.europa.eu/activities/res/ca2011/ca2011-report