border, stretches 4000 miles, and most of it is wide open, no fences, no gates, no nothing. that creates a huge challenge for the border patrol. rick leventhal is streaming to us live from the border patrol station in mecina, new york. rick. >> reporter: jon, a recent general accounting office study found less than 1 percent of those 4000 miles were at an acceptable security level in 2010, but they do face a significant challenge up here, including the fact that the northern border is more than twice as long as the southern border, but they have about 1/10 as many border agents to secure it. plus the terrain is so rough and rugged that they can't patrol it using traditional methods, so yesterday the feds showed us what they do. they took us out on snow cats for an exclusive ride-along along the santa lawrence river, which is frozen over and divides new york from canada. this region and this