WE THE PEOPLE

President Barack Obama walks in the Residential Drug Abuse Prevention Unit at El Reno Prison after making a statement to the press, in El Reno, Okla., July 16, 2015. (Official White House Photo by Pete Souza)

President Barack Obama talks with Vice President Joe Biden, Secretary of State John Kerry, Colin Kahl, National Security Advisor to the Vice President, and National Security Advisor Susan E. Rice outside the West Wing of the White House, July 15, 2015. (Official White House Photo by Pete Souza)

President Barack Obama walks down the Cross Hall with Vice President Joe Biden after he delivers a statement on the Iran nuclear agreement in the East Room of the White House, July 14, 2015. (Official White House Photo by Chuck Kennedy)

President Barack Obama talks with national security staff in the Oval Office after being notified of the nuclear agreement with Iran. From left, Chief of Staff Denis McDonough; Jeffrey Prescott, NSC Senior Director for Iran, Iraq, Syria, and the Gulf States; National Security Advisor Susan E. Rice; Avril Haines, Deputy National Security Advisor for Counterterrorism and Ben Rhodes, Deputy National Security Advisor for Strategic Communications, July 13, 2015. (Official White House Photo by Pete Souza)

18th Chairman of the Joint Chiefs of Staff Gen. Martin E. Dempsey talks with Service Members deployed to Iraq during townhall in Baghdad, Iraq, July 18, 2015. (DoD photo by Mass Communication Specialist 1st Class Daniel Hinton/released)

U.S. Deputy Defense Secretary Bob Work, left, greets Japanese Adm. Katsutoshi Kawano, chief of the joint staff for Japan Self-Defense Forces, as he arrives at the Pentagon, July 16, 2015. The two leaders met to discuss matters of mutual importance.

A U.S. Air Force F-16 Fighting Falcon “Triple Nickel” aircraft pilot assigned to the 555th Expeditionary Fighter Squadron from Aviano Air Base, Italy, waits as Airmen from the 455th Expeditionary Aircraft Maintenance Squadron complete a final check of the aircrafts weapons before taking off on a combat sortie from Bagram Air Field, Afghanistan, July 14, 2015. The F-16 is a multi-role fighter aircraft that is highly maneuverable and has proven itself in air-to-air and air-to-ground combat. Members of the Triple Nickel are deployed in support of Operation Freedom’s Sentinel and NATO’s Resolute Support mission. (U.S. Air Force photo by Tech. Sgt. Joseph Swafford/Released)