FX’s The Bridge , about a serial killer investigation that entangles both sides of the U.S.–Mexico border, is very good. If you haven’t seen the Danish-Swedish series it’s based on, you might even think it’s great. At The Daily Beast, you can read my latest story (one of my very last ones, in fact), "FX's Border-Killer Thriller," in which I review FX's The Bridge , based on the Danish/Swedish drama Broen , which begins tonight at 10 p.m. on FX. Borders are complex signifiers, reinforcing both national and cultural identities as well as distinguishing between outsiders and insiders. Where you are, how you see yourself, depends largely on what side of the wall—visible or invisible—you’re standing on at the moment. Few modern-day national borders are as fraught or as psychologically charged as that between the United States and Mexico, a nearly 2,000-mile line in the sand that is the most frequently crossed international border in the world. It’s this internationa...