Edward Snowden

As head of U.S. counterintelligence, William Evanina's job is to stop America's enemies from spying here. "We spend a lot of time fixing what's happened," he says. He'd like to see greater prevention.

You can probably guess what a former deputy director of the National Security Agency thinks of the new biopic on Edward Snowden.

The National Security Agency's deputy director tells NPR he expects "other shoes to drop" from ex-contractor Edward Snowden's revelations. But "things have changed a lot" since the leaks, he says.