It seems that all that frantic fence-building along the U.S.-Mexican border is proving no match for determined drug cartels. The wildlife, on the other hand, may be having a tougher time. To document and chronicle this largely ignored story (it's been two years since Congress, at the height of illegal immigrant hysteria, enacted the Secure Fence Act), a team of conservation photographers and biologists have just embarked on a three week journey into the borderlands. For a glimpse of what may lurk ahead for this bunch, check out Jonathan Thompson's recent account from the "narco trail." At the very least, it will make you think twice about making a family stopover in southern Arizona's backcountry.