The Federal Bureau of Investigations has a new leader.
James Comey was sworn in Monday as the law enforcement agency's seventh director.
A former U.S. attorney in New York, Comey served in the Justice Department under former President George W. Bush.
Comey gained notoriety after he refused to go along with Bush's demands on warrant-less wiretapping unless drastic changes were made.
President Barack Obama says he picked Comey because of his deep knowledge of the law and "unwavering moral compass".
"What gave me confidence that this was the right man for the job wasn't his degrees, and it wasn't his resumé. It was in talking to him and seeing his amazing family, a sense that this is somebody who knows what's right and what's wrong," Obama said.
"The FBI must be independent of all political forces or interests in this country," Comey said. "In a real sense, it must stand apart from other institutions in American life."
Comey takes over for Robert Mueller, who was head of the FBI for the past 12 years.