A secret network of U.S. engineers and scientists providing technical assistance to the country’s overseas undercover agencies has been compromised, a report says. Foreign spy agencies are cross-referencing several compromised databases, the Los Angeles Times reports. The report raises concerns for government agencies and private businesses, a security analyst says. “Our biggest fear has been that these data breaches were not isolated incidents, but part of a larger campaign with the intent to expose intelligence agents and others with security clearances around the world,” he adds.”]