Programs such as the Hetrogenous Aerial Reconnaissance Team program developed by DARPA have automated much of the aerial surveillance process. They have developed systems consisting of large teams of drone planes that pilot themselves, automatically decide who is “suspicious” and how to go about monitoring them, coordinate their activities with other drones nearby, and notify human operators if something suspicious is occurring.
This greatly increases the amount of area that can be continuously monitored, while reducing the number of human operators required. Thus a swarm of automated, self-directing drones can automatically patrol a city and track suspicious individuals, reporting their activities back to a centralized monitoring station. 
The Pentagon is not content to simply watch the enemies it knows it has. It also wants to identify potentially hostile behavior and intent, in order to uncover clandestine foes. Charles River Analytics is building a so-called “Adversary Behavior Acquisition, Collection, Understanding, and Summarization (ABACUS)” tool.
The system would integrate data from informants’ tips, drone footage, and captured phone calls. Then it would apply “a human behavior modeling and simulation engine” that would spit out “intent-based threat assessments of individuals and groups.” In other words: This software could potentially find out which people are most likely to harbor ill will toward the U.S. military or its objectives.
“The enemy goes to great lengths to hide his activities,” explained Modus Operandi, Inc., which won an Army contract to assemble “probabilistic algorithms that determine the likelihood of adversarial intent.” The company calls its system “Clear Heart.” As in, the contents of your heart are now open for the Pentagon to see. 
Big Brother has hundreds of satellites, undisclosed numbers of military surveillance aircraft, dozens of different types of UAVs and MAVs, and other surveillance craft we are not aware of. Big Brother can watch you 24-7 if he wants to.
Look for thousands of UAVs to clutter the skies of America in the next decade. You will see these spy drones over virtually every major metropolitan area in America. You will also see them patrolling the vast deserts in the southwest of America and the coasts from the east to the west and along the southern coastline. They will be everywhere not only here in America but around the world. Big Brother has unlimited resources and he will not stop until every square inch of Earth is under surveillance 24-7.
”BAA 04-05-PIP: Heterogeneous Airborne Reconnaissance Team (HART).”Information Processing Technology Office (DARPA) — Official Website. December 5, 2003. www.darpa.mil/ipto/solicit/baa/BAA-04-05_PIP.pdf. [Dead link]
 Sirak, Michael. “DARPA, Northrop Grumman Move Into Next Phase of UAV Control Architecture.” Defense Daily. 11.29.2007.