While President Obama has vehemently denied issuing direct orders to the Justice Department or other domestic agencies to monitor President Trump during the 2016 election campaign, it is common knowledge that the National Security Agency has the ability to access video and audio from any number of devices in real time. In fact, according to Edward Snowden and documented in the recently released Snowden motion picture, U.S. spy agencies can simply flip a switch to watch or listen in on anything going on in a particular room by turning on a particular device's cameras and microphones.

Here's how it works: