“They risk imprisonment or death stealing the secrets of their own governments. Their identities are among the most closely protected information inside American intelligence and law enforcement agencies. Losing even one of them can set back American foreign intelligence operations for years,” the New York Times reports.
“Clandestine human sources are the lifeblood of any espionage service. This helps explain the grave concern within American agencies that information from undercover sources was included in some of the classified documents recently removed from Mar-a-Lago, the Florida home of former President Donald Trump — raising the prospect that the sources could be identified if the documents got into the wrong hands.”