In a damning exposé published Monday, The Intercept reporter Ryan Gallagher dives into the inner workings of National Security Agency’s (NSA) largest overseas spying base, the U.K.’s Menwith Hill Station, and reveals concrete evidence that the British government is complicit in the United States’ targeted killing program. Citing top-secret documents obtained from NSA whistleblower Edward Snowden, Gallagher reports, “The files reveal for the first time …