The American Association for the Advancement of Science is an international non-profit organization dedicated to advancing science for the benefit of all people. Research news, issue papers. Educational programs, science policy (U.S. and international)... 

http://www.aaas.org/

The American Physical Society (APS) is a non-profit membership organization working to advance and diffuse the knowledge of physics through its outstanding research journals, scientific meetings, and education, outreach, advocacy, and international activities... 

http://www.aps.org/