The U.S. government routinely conducts experiments on weather modification, and has been doing so for at least half a century. Previously classified under such names as "Project Cirrus" (1947) and "Project Popeye" (1966), weather modification is no longer a secret practice. In fact, a bill (S517) was sponsored in 2005 by Texas Sen. Kay Bailey Hutchinson, a Republican, "to establish the Weather Modification Operations and Research Board, and for other purposes." This bill did not become law. Yet, there is reason to believe that various government institutions are carrying out numerous legal and illegal weather experiments without informing the public.
Here we go: http://www.globalresearch.ca/index.php?context=va&aid=7139