These Bipartisan Security Experts Say Climate Change Is A National Security Threat

http://thinkprogress.org/climate/2015/10/23/3715200/bipartisan-security-experts-climate-change-threat/
"The statement released Thursday directly references a a 2014 Pentagon report released by the U.S. Department of Defense calling climate change a “threat multiplier.” The Partnership for a Secure America, which published the ad, said that the DoD is concerned that the effects of climate change could “prevent access to their workforce, degrade the security of installations, impede training and readiness, and impair force capacity.
Security threats associated with climate change are already being observed in a number of areas of the world. Climate change is considered a contributing factor to the wars in Syria, and climate-related crop failures and droughts in the Middle East and African Sahel are contributing to migration pressures.
Even back in 2013, Admiral Samuel J. Locklear III, commander of the U.S. Pacific Command, answered the question about what the greatest security threat the region faces with two familiar words: climate change."