Source PIX11
Transit locations are patrolled by the police and they have some assistance from some very qualified dogs.
At the MTA Police Canine Training Facility, the teams learn how to detect explosives, controlled substances and objects.
PIX11 News was able to showcase the multiple courses; see the video at: http://pix11.com/2018/06/13/dogs-help-protect-new-yorks-transit-systems/