Watch the 3rd Annual Defense One Summit, featuring Director of National Intelligence James Clapper, Deputy Defense Secretary Bob Work, U.S. Army Chief of Staff Gen. Mark Milley, Rep. Mac Thornberry, R-Tex., chairman, House Armed Services Committee, Chairman of the House Armed Services Committee and White House Deputy National Security Advisor Ben Rhodes.

The Summit has become a must-attend event for U.S. national security leaders. This year’s theme is “The Age of Everything,” to focus on how commanders and security leaders are meeting the high demand for all types of missions and threats—from the battlefield to the homeland, Kabul to Chattanooga.

Agencies and organizations represented at the Defense One Summit include: the U.S. Department of Defense, the U.S. Army, the U.S. Navy, U.S. Special Operations Command, CIA, the FBI, the White House, the U.S. Department of Justice, the National Counterterrorism Center, Intelligence Advanced Research Projects Activity (IARPA), in addition to defense industry leaders and technology experts.

Follow the conversation on Twitter at @DefenseOne and join in by using the hashtag #DefOneSummit2015.