Memorial for service members killed in Chattanooga attack

Vice President Joe Biden pauses while speaking at the memorial service ceremony for service members killed in the July 16 attack in Chattanooga, Tenn., Saturday, Aug. 15, 2015.

Chattanooga Mayor Andy Berke speaks at the memorial service ceremony for service members killed in the July 16 attack in Chattanooga, Tenn., Saturday, Aug. 15, 2015.

Secretary of the Navy Ray Mabus speaks at the memorial service ceremony for service members killed in the July 16 attack in Chattanooga, Tenn., Saturday, Aug. 15, 2015.

U.S. Secretary of Defense Ash Carter speaks at the memorial service ceremony for service members killed in the July 16 attack in Chattanooga, Tenn., Saturday, Aug. 15, 2015.

A Marine listens while Vice President Joe Biden speaks at the memorial service ceremony for service members killed in the July 16 attack in Chattanooga, Tenn., Saturday, Aug. 15, 2015.

Gov. Bill Haslam, left, and U.S. Sen. Bob Corker attend the memorial service ceremony for service members killed in the July 16 attack in Chattanooga, Tenn., Saturday, Aug. 15, 2015.

Gov. Bill Haslam, right, shakes hands with U.S. Secretary of Defense Ash Carter, center, as U.S. Sen. Bob Corker looks on at the memorial service ceremony for service members killed in the July 16 attack in Chattanooga, Tenn., Saturday, Aug. 15, 2015.

Vice President Joe Biden speaks at the memorial service ceremony for service members killed in the July 16 attack in Chattanooga, Tenn., Saturday, Aug. 15, 2015.

People in attendance including Lacie Stone, spokeswoman of Chattanooga Mayor Andy Berke, center, react while Vice President Joe Biden speaks at the memorial service ceremony for service members killed in the July 16 attack in Chattanooga, Tenn., Saturday, Aug. 15, 2015.

Vice President Joe Biden leaves after speaking at the memorial service ceremony for service members killed in the July 16 attack in Chattanooga, Tenn., Saturday, Aug. 15, 2015.

Members of the fallen soldiers' family pay tribute at the end of the memorial service ceremony for service members killed in the July 16 attack in Chattanooga, Tenn., Saturday, Aug. 15, 2015.

Vice President Joe Biden speaks at the memorial service ceremony for service members killed in the July 16 attack in Chattanooga, Tenn., Saturday, Aug. 15, 2015.

A participant of a memorial service holds an American flag at Mckenzie Arena to honor the fallen service members killed in the July 16 shooting in Chattanooga, Tenn., Saturday, Aug. 15, 2015.

The stage for a memorial service is set at Mckenzie Arena to honor the fallen service members killed in the July 16 shooting in Chattanooga, Tenn., Saturday, Aug. 15, 2015.

Participants of a memorial service wait at Mckenzie Arena to honor the fallen service members killed in the July 16 shooting in Chattanooga, Tenn., Saturday, Aug. 15, 2015.