National Academy of Sciences 146th Annual Meeting

Monday, April 27, 2009 - 9 a.m. EDT

Washington, D.C.

President Barack Obama addresses members of the National Academy of Sciences gathered at its annual meeting. Introducing Mr. Obama are National Academy of Sciences President Ralph J. Cicerone and John P. Holdren, assistant to the president for science and technology and director of the White House Office of Science and Technology Policy.