Rear Admiral (ret.) David W. Titley,  Director, Center for Solutions to Weather and Climate Risk at Penn State, provided testimony to the United States Senate on July 22, 2014, regarding U.S. Security Implications of International Energy and Climate Policies
and Issues.

The complete testimony can be viewed here (PDF):
http://www.foreign.senate.gov/imo/media/doc/Titley_Testimony.pdf