"From thousands of classified documents, the National Security Agency emerges as an electronic omnivore of staggering capabilities, eavesdropping and hacking its way around the world to strip governments and other targets of their secrets, all the while enforcing the utmost secrecy about its own operations."
When Ban Ki-moon, the United Nations secretary general, sat down with President Obama at the White House in April to discuss Syrian chemical weapons, Israeli-Palestinian peace talks and climate change, it was a cordial, routine exchange.
The National Security Agency nonetheless went to work in advance and intercepted Mr. Ban's talking points for the meeting, a feat the agency later reported as an "operational highlight" in a weekly internal brag sheet. It is hard to imagine what edge this could have given Mr. Obama in a friendly chat, if he even saw the N.S.A.'s modest scoop. (The White House won't say.)