The historical incident
The source describes the 11 December 2017 explosion in a crowded underground walkway in Midtown Manhattan. Five people including the attacker were reported injured. The bulletin cites reports raising the possibility of workplace equipment or materials being misused.
Workplace lessons
Account for materials and equipment, provide open grievance channels and create confidential reporting routes for suspected radicalisation. Coordinate security and continuity plans, building-management networks and staff training. Reports should describe observable concerns, without stereotyping a religion or ethnicity.