Brian Bennett and W. J. Hennigan report:
Foreign spy services, especially in China and Russia, are aggressively aggregating and cross-indexing hacked U.S. computer databases — including security clearance applications, airline records and medical insurance forms — to identify U.S. intelligence officers and agents, U.S. officials said.
At least one clandestine network of American engineers and scientists who provide technical assistance to U.S. undercover operatives and agents overseas has been compromised as a result, according to two U.S. officials.
Read more on the Los Angeles Times.