Well, in my first post I mentioned I hack into building security systems and you replied first floor only has cameras on them, so I did not write it but intent was Ghost has very least first floor cameras hacked into so he can view through them.<br/><br/>Also one his bots is in front entrance of the building and keeping eye on things so through the bot Ghost would had seen American Star to enter (and then via surveilance cameras in first floor and usually bathrooms and elevators also got such cameras in high security buildings). Also hacking into power stations they have computers and monitors which observe all electric traffic (where power goes and how it is used). Monitoring such thing is highly important for maintenance as if something does not work, they can tell is problem in that 'power does not go where it's meant to go' or if power does connect to the device in a building (like water pumps, heating, elevators etc), they know issue is elsewhere. So via those monitors (which got hacked) Ghost has complete access to know where power is transfered so long the said device does not have independant (speaking generators) power source.