WE THE PEOPLE

President Barack Obama greets recipients of the 2013 Presidential Award for Excellence in Mathematics and Science Teaching prior to joining them for a group photo in the East Room of the White House, July 31, 2015. (Official White House Photo by Amanda Lucidon)

President Barack Obama gets a hug from Johnsenia Brooks after a group photo with American Legion Girls Nation delegates in the East Room of the White House, July 30, 2015. (Official White House Photo by Pete Souza)

President Barack Obama talks with Vice President Joe Biden, in the Oval Office, July 29, 2015. (Official White House Photo by Pete Souza)

President Barack Obama and Members of Congress view “Lucy,” the 3.2 million year old fossilized bones of a human ancestor, at the National Palace in Addis Ababa, Ethiopia, July 27, 2015. Zeresenay Alemseged, an Ethiopian paleoanthropologist, explains the fossil. (Official White House Photo by Pete Souza)

Crowds line up at the fence line and wait in trees for a view of President Barack Obama disembarking Marine One upon arrival at the Kenyatta landing zone in Nairobi, Kenya, July 26, 2015. (Official White House Photo by Pete Souza)

Marines execute a pass and review during a sunset parade at the Marine Corps War Memorial in Arlington, Va., July 28, 2015. Navy Adm. Harry B. Harris, commander of U.S. Pacific Command, was the parade’s guest of honor. The Marines are assigned to Marine Barracks Washington.

Basic cadets navigate the monkey bars on the obstacle course in the U.S. Air Force Academy’s Jacks Valley during the field portion of their Basis Cadet Training July 22, 2015, in Colorado Springs, Colo. “Second Beast” is the second half of Basic Cadet training which began with inprocessing June 25, 2015. (U.S. Air Force Photo/Liz Copan/released)

NAIROBI, Kenya (July 23, 2015) A U.S. Marine with the “Greyhawks” of Marine Medium Tiltrotor Squadron 161 (Reinforced), 15th Marine Expeditionary Unit (MEU), wipes down an MV-22B Osprey after takeoff and landing drills at Jomo Kenyatta International Airport. The Marines are in Kenya to support President Barrack Obama’s visit. Elements of the 15th MEU, based out of Camp Pendleton, California, and embarked aboard the Essex, are conducting naval operations in the 6th Fleet areas of operation in support of U.S. national security interests in Europe and Africa. (U.S. Marine Corps photo by Cpl. Elize McKelvey/Released)

150729-M-GO800-063 PACIFIC OCEAN (July 29, 2015) – U.S. Army Sgt. Jonathon Bailey shouts instructions while performing push-ups aboard the Military Sealift Command joint high-speed vessel USNS Millinocket (JHSV 3) during a physical training session designed to help with stress management July 29. Task Force Forager, embarked aboard the Millinocket is serving as the secondary platform for Pacific Partnership, led by an expeditionary command element from the Navy’s 30th Naval Construction Regiment (30 NCR) from Port Hueneme, Calif. Now in its 10th iteration, Pacific Partnership is the largest annual multilateral humanitarian assistance and disaster relief preparedness mission conducted in the Indo-Asia Pacific region. While training for crisis conditions, Pacific Partnership, missions have provided medical care to approximately 270,000 patients and veterinary service to more than 38,000 animals. Additionally, Pacific Partnership has provided critical infrastructure development to host nations through the completion of more than 180 engineering products. (U.S. Marine Corps photo by combat correspondent Sgt. James Gulliver/Released)