Information provided for this graphic is part of a massive trove of secret documents leaked last year to the anti-secrecy website WikiLeaks. They were made available to The New York Times by another source, on condition of anonymity, and shared with NPR.
This graphic was updated on May 5, 2011 after additional documents were made available to NPR.
Source: U.S. Department of Defense, New America Foundation, U.S. Department of State and NPR/New York Times research
Credit: Nelson Hsu, Margot Williams and Alicia Cypress