Snowden: Mass surveillance has limits
Cambridge, Mass. — National Security Agency leaker Edward Snowden says the Boston Marathon bombings are an example of how threats can be missed even under blanket surveillance.
Snowden, who leaked millions of documents to journalists, talked to Harvard Law professor Lawrence Lessig on Monday online from Russia, where he is in exile.
The Boston Globe reports that Snowden referenced the suspected marathon bombers, saying “we knew who these guys were” but “we didn’t follow up or watch these guys.”
Dzhokhar Tsarnaev is awaiting trial for April 2013 explosions that killed three people. His brother, Tamerlan, was killed in a shootout with police.
In 2011, Russian intelligence told the FBI that Tamerlan Tsarnaev was a follower of radical Islam, and U.S. officials added their mother to a federal terrorism database.