Rachel Maddow recaps NSA's lifelong history of overstepping its bounds to spy on innocent U.S. citizens and getting caught over and over again

Author James Bamford says that at the C.I.A., Gen. Keith Alexander, head of the NSA for nine years, is referred to as "Emperor Alexander." He has, for nearly a decade, arguably wielded more power over Americans than anyone else in government, including the president. How? Read this.