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(Two Articles on security of America's infrastructure)
The Evolution of Critical Infrastructure Targeting by Violent Extremists
By Ilana Krill
https://www.lawfareblog.com/evolution-critical-infrastructure-targeting-violent-extremists
and
The Emerging Cyber Threat to the American Rail Industry
By Claudia Swain
https://www.lawfareblog.com/emerging-cyber-threat-american-rail-industry
.