Some EXCELLENT ideas here!

     In a recent interview with CNN, the Director of the Secret Service
     noted that his organization is increasingly focusing on the cyber
     security of the physical facilities visited by the President of the
     United States as part of its duty to protect him. This raises the
     fascinating question of just how much cybersecurity will become part
     of the physical security conversation in 2017.

     [...]

     Imagine a major head of state on an official visit to a foreign
     country or even a visit by the President of the United States to
     another part of the US. Security forces go to great lengths to
     construct a physical security cordon and maintain exclusive control
     over who is able to enter that controlled space. Yet, the growing
     Internet of Things means that more and more the various objects in
     that controlled space, from the light bulbs overhead to the
     elevators to the fire alarms to the traffic cameras are all remotely
     accessible.
     Imagine a foreign intelligence service that wanted to disrupt and
     embarrass a foreign head of state visiting another country. Today
     they might hack into the local police offices in the city being
     visited and monitor email accounts and document archives to locate
     official security plans and schedules for the visit to plant paid
     protesters holding large signs along the motorcade route. But, take
     this a step further and consider for a moment the new factor of the
     vast Internet of Things that envelopes that visit.
     Those hackers could monitor all of the traffic cameras in the area
     to watch the head of state’s movements in realtime and monitor his
     or her schedule second by second. As he enters a building, the local
     CCTV cameras throughout that building could be used to surveil his
     movements and compile an intelligence list of everyone he meets
     with.
     Yet, here’s where things get far more worrying.

     When he steps on the elevator to change floors, those hackers could
     disable the elevator system and trap him, disrupting his visit and
     generating media images of him being helplessly dragged up a ladder
     to safety.
     Or they could trigger the fire alarms or overheat a piece of
     equipment to cause a real fire and activate the sprinkler system,
     leading to images of a soaked and miserable leader cutting his visit
     short.
     Given that most modern office buildings have switched to electronic
     access controls, those hackers could simply deactivate all locks
     across the building, instantly rendering the entire facility
     unsecured, doors flapping in the breeze and causing mass panic among
     his guards.
     Or, they could move to paralyze the entire city, cutting power to
     every major building, while activating fire alarms across the city
     and manipulating traffic signals to cause massive traffic accidents
     and trap first responders helplessly across the city and preventing
     him from reaching his next appointments.

   Forbes:
   [1]http://www.forbes.com/sites/kalevleetaru/2017/01/13/when-cybersecuri
   ty-meets-physical-security/

References

   1. http://www.forbes.com/sites/kalevleetaru/2017/01/13/when-cybersecurity-meets-physical-security/