Defending All the Targets Is Impossible
In the wake of the recent averted mass shooting on the French railroads, officials are realizing that there are just too many potential targets to defend.
The sheer number of militant suspects combined with a widening field of potential targets have presented European officials with what they concede is a nearly insurmountable surveillance task. The scale of the challenge, security experts fear, may leave the Continent entering a new climate of uncertainty, with added risk attached to seemingly mundane endeavors, like taking a train.
The article talks about the impossibility of instituting airport-like security at train stations, but of course even if were feasible to do that, it would only serve to move the threat to some other crowded space.