The new head of the National Security Agency said Tuesday that the agency's newly revealed facial recognition program is legal.

“We do not do this in some unilateral basis against US citizens,” Admiral Michael S. Rogers said at the Bloomberg Government cybersecurity conference in Washington, DC. “We have very specific restrictions when it comes to US persons.”

Rogers reportedly did not cite what those restrictions are. He also noted that the NSA doesn’t access motor vehicle or passport databases to check against images of US citizens.

“In broad terms, we have to stop what we’re doing if we come to the realization that somebody we’re monitoring or tracking has a US connection that we were unaware of,” Rogers said. “We have to assess the situation, and if we think there is a legal basis for this, and we have to get the legal authority or justification.”

Rogers also said that he does not believe that former NSA contractor and whistleblower Edward Snowden acted alone, but he believes that Snowden was not being manipulated by Russia or another foreign power. "Could he have [been]? Possibly. Do I believe that that's the case? Probably not," he said.

Outgoing congressman Rep. Mike Rogers (R-MI) has said that he believes Snowden had help from Russian authorities before ending up with temporary asylum in Russia.