Spying: They call it the CIA's "dirty laundry": declassified documents on assassination plots, domestic surveillance, abductions and the like. But those fighting the terror war can't win without getting their hands dirty. In announcing the public release of nearly 700 pages detailing controversial CIA activities over the quarter century preceding the mid-1970s, the agency's director, Gen. Michael Hayden, remarked that it provided "a glimpse of a very different time and a very different Agency." But if America is to combat the elusive terrorist enemies we face today, our intelligence agencies may well have to return to some of their aggressive...