Nuclear Security Summit 2016

President Barack Obama, flanked by Jordan’s King Al Sharif Abdullah Bin Al Hussein, left, and Dutch Prime Minister Mark Rutte, gestures as they wait for two more leaders prior to posing for a group photo during the Nuclear Security Summit, Friday, April 1, 2016, in Washington. (AP Photo/Alex Brandon

The threat of nuclear and radiological terrorism remains one of the greatest challenges to international security, and the threat is constantly evolving. We, the leaders, gathered in Washington, D.C. on the first day of April, 2016 on the occasion of the fourth Nuclear Security Summit, are proud to observe that the Summits have since 2010 raised awareness of this threat and driven many tangible, meaningful and lasting improvements in nuclear security.

Read the full communiqué at, and read more about the Nuclear Security Summit at