Observe this U.S. Air Force weather-warfare webpage:
http://www.au.af.mil/au/database/research/ay1996/acsc/96-025ag.htm
it says:
"In the US, weather modification will likely
become a part of national security policy with
both domestic and international applications."
That indicates that weather modifications classified as "national security" (probably secret) operations are planned to occur within the United States. If witnesses across the US are seeing cloud-seeding operations conducted by Air Force jets, it seems that such secret Ops may be happening right now.
This page gives a governmental definition of "security": http://glossary.its.bldrdoc.gov/fs-1037/dir-032/_4740.htm
"[2] With respect to classified matter, the condition that prevents unauthorized persons from having access to official information that is safeguarded in the interests of national security."
So when the first military webpage says domestic weather-control Ops will be a subset of "national security policy" it suggests they could be secret.
If this nationwide military-cloud-seeding operation has been happening for over a year, or even as far back as the late 1970's (as one witnesses told ENS), and the only way news of this surfaces to the people is either by direct witness, rumor, or out-of-the-way and alternative-news sources, this suggests a uniform news blackout is being conducted by the major media, and that media heads must be "authorized persons."
This situation reminds me of the "Truth by Decree" essay: http://www.erols.com/igoddard/decree.htm
"The more restrictions and prohibitions in the world,
the poorer people get." Lao Tzu, "Tao Te Ching"