The unmanned planes look north toward the long, lightly defended and admittedly porous Canada-U.S. border - the best route many Americans believe for jihadists seeking to attack the United States to sneak across.Like their missile-carrying military cousins prowling Pakistan's skies targeting al-Qaeda suspects, the unarmed Predator aircraft that have patrolled the 49th parallel since 2009 are high-tech, sophisticated and little understood. And they are part of the same diffuse and determined effort the Unites States is making to secure its borders and defend itself.
| Learn More
Discover content from The Globe and Mail that you might otherwise not have come across. Here we’ll provide you with fresh suggestions where we will continue to make even better ones as we get to know you better.