better understand and to improve resilience to the effects of EMPs and GMDs across all critical infrastructure sectors, including coordinating the prioritization of critical infrastructure at greatest risk to the effects of EMPs and GMDs. (3) Coordination (A) Report on technological options Not later than December 21, 2020, and every 4 years thereafter until 2032, the Secretary, in coordination with the Secretary of Defense, the Secretary of Energy, the heads of other appropriate agencies, and, as appropriate, private-sector partners, shall submit to the appropriate congressional committees, a report that— (i) assesses the technological options available to improve the resilience of critical infrastructure to the effects of EMPs and GMDs