More than 1,800 people from 200 industry and government organizations, including about two dozen PJM staffers, took part in the North American Electric Reliability Corp.’s two-day cyber and physical security drill Nov. 13-14.

GridEx II tested utilities’ and transmission providers’ crisis response plans through a series of mock cyber and physical attacks, building on lessons learned from NERC’s initial exercise in 2011.

The exercise also tested communications among industry and government agencies through NERC’s Electricity Sector-Information Sharing and Analysis Center (ES-ISAC). The departments of Energy, Homeland Security and Defense participated, along with the FBI and Canadian and Mexican utilities and agencies.

NERC said it will issue a report detailing findings and recommendations from the drill in the first quarter of 2014.