She saw that they seemed to be scanning as they moved through the throngs of travelers at a pace unique from those around them. In the counterintelligence realm, it’s known as “irregular lines of movement.” The men were moving perpendicular to both incoming and outgoing passengers, adjusting their trajectory in unpredictable patterns. She’d noted that the pair were neither rushed and determined passengers hustling to find and leap aboard their train before it left the station, nor were they idly standing
