helicopters and the like seen above the skyline are mapping out escape routes and taking photographs for landing locations. city never analyzed like this before for u.s. president because the white house opened in 1800, never a president resided outside of it but trump is full of firsts and secret service and military and nypd must adjust. >> see increasing security posture around trump tower. lot of standoff distance, physical changes to the location to mitigate a lot of different threats. >> and if there were a threat agents would have less than a minute to bring the president and his family to safety. >> have to extract from the top of this building. how do we do that safely? notify the law enforcement partners there is this action? >> reporter: questions that need to be addressed but put into