right now it's a potential target for blood thirsty isis terrorists. a threat that law enforcement agencies are taking very seriously. >> we're increasing our patrol efforts whether it's uniform patrol, plain clothes officers or random explosive bag screening as well as our canine patrols. >> the security increases coming soon after the release of an isis video threatening washington, d.c. with paris-style attacks. >> so who is on the front lines? meet yankee and fico, members of elite canine unit on a mission to keep us safe. >> in light of the events in paris, you can never be too careful. >> at any given moment, these police dogs along with uniformed officers and undercover agents mixed in with the population are on subways just like this all across the country. but the mission has become more urgent. within minutes of the paris attack, the concern grow here that this terror could come to america you will