It wouldn't be unprecedented for him to be held in contempt for refusing to reveal a source, but the article doesn't make clear that it is not illegal for a jou

It wouldn't be unprecedented for him to be held in contempt for refusing to reveal a source, but the article doesn't make clear that it is not illegal for a journalist to leak classified information as long as they're not the one who holds the clearance. It is very illegal for someone who holds a clearance to provide that information to a reporter, but if you happen to stumble across it without breaking the law, you can publish it. Mark Klein, the AT&T engineer who found the NSA wiretaps in the AT&T colo was never prosecuted for this reason. He was just doing his job, sans clearance, and stumbled into the blueprints.