The Environmental News Service (http://www.ens.lycos.com) has a follow-up to their report about multiple sightings around the U.S. of massive grid-work patterns in the sky being created by fleets of jets that fly back and forth and spray down a material that seems to make people ill.
In their follow-up , ENS interviews Thomas Farmer, an ex-Raytheon Missile Systems engineer who's been tracking the mysterious spraying incidents for over a year. Farmer has confirmed that jets used to spray are Air Force jets, and he's made several collections of the cobweb-like, or "angel hair," material the jets are spraying out, which made him, just like many others, sick after contact. It appears to be a substance used to seed (build) clouds.
ENS reports that Farmer is "fairly certain the contrail phenomena is one part of a military weather modification weapons system." The ENS report then observes that a sub-set of the military plan to use weather as a weapon and create a "Weather Force," is massive cloud-seeding that will work in with the HAARP antenna in Alaska, which is the U.S. military's primary weather-weapons system, which can exert effects on locations across the earth.
The openly-stated goal for the U.S. military is to "own the weather"  by year 2025 and to thereby be able to bring target populations to their knees by "storm enhancement," "storm modification," and being able to "induce drought."  So rather than natural laws of solar-heating and earth-rotation directing the weather, the weather will be determined by who is pleasing or displeasing our military masters, or then again, perhaps power does not really corrupt.
A U.S. military web page  states that weather modification by the military is intended to allow for "storm triggering/enhancement using airborne cloud seeding." That military web page also says:
"A global network of sensors provides 'weather warriors' with the means to monitor and accurately predict weather activities and their effects on military operations. A diverse set of weather modification tools allows manipulation of small-to-medium scale weather phenomena to enhance friendly force capabilities and degrade those of the adversary. Many of the sensors required for this system are assumed to be... part of the global information management system (GIMS)..."
Apart from allowing for an Orwellian-weather tyranny, military-weather control could lead to environmental catastrophe, since the desire to exert control will conflict with and overpower rational environment considerations, particularly if control is directed under the cover of military secrecy. Deliberate large-scale modification of the weather must be the most dangerous thing we could do to our planet, and it appears that military-weather-control planning is being done in secret, outside the realm of democratic oversight, just where it needs to be for the worst outcomes!
 Read The Full Environmental News Service Report "Mystery Contrails May Be Modifying Weather" (1/12/99): www.ens.lycos.com/ens/jan99/1999L-01-12-01.html
 Weather as a Force Multiplier: Owning the Weather in 2025:
 Military Weather Analysis and Modification System:
After my first message on this topic one person replied saying the grid pattern of contrails appeared in their area in Idaho and 13 people (mostly old) died shortly there after. Another person responded saying they've seen unique grid-work contrail patterns in Georgia.
Web Pages On The HAARP Weather-Weapon System: NEXUS article on HAARP: "Vandalism in the Sky" www.earthpulse.com/haarp/vandalism.html
And at: www.icom.net/~nexus/HAARP.html.
Cloud Seeding & Weather Modification Pages: