Actually we do know the truth.
Jet engine exhaust moisture leaves contrails.
You are basing your suspicions on a theory. A theory is just that, a theory, until there is evidence to support the theory.
Usually theories are thought up when people observe something that there is no explanation for.
What makes the "chemtrail" theory impossible to prove is that you first have to explain why the contrails (which are known by science/meteorology to be caused by exhaust moisture sublimating in highly saturated super-cold air) are not the contrails that science knows they are, but INSTEAD something different- something which there is no evidence for.
There is no mystery about contrails: how and why they form, why they can persist, etc...
Your evidence- the photo- showed a 747-8 freighter, DHL N853GT:
http://www.airliners.net/photo/Polar-Air-Cargo/Boeing-747-87UF-SCD/2412970/L/&sid=43ac457ba0232500018484acdee98800 , a four-engine aircraft, leaving four contrails. This matches up with the known, scientifically verified theory of engine exhaust coming from each of the four engines.
Your photo evidence actually serves to confirm what science and pilots already know.
Each engine makes a contrail.
If you deny that the exhaust moisture contrails in your photo came from the engines, what evidence do you have that demonstrates that the contrails are not contrails?
In the photo above of the exact aircraft you witnessed, where are the "spray nozzles"?
http://img.planespotters.net/photo/...argo-Boeing-747-8_PlanespottersNet_383798.jpg
Are they mounted above the engines to trick people into thinking they are contrails?
What happens when the engines are making contrails and the "spray nozzles" are on?
Are there eight contrails? Is there a photo of this?
Why do "chemtrail" trails look identical to exhaust moisture contrails?
Shouldn't they look different if one is made of exhaust moisture and the other is made of aluminum/strontium etc. ?
Please understand that the only reason we post here is because we have compassion for people who are living in fear of the "chemtrail" hoax that has been foisted upon them. I am not criticizing you in any way. But, as the person with the theory, the burden of proof is on you.
This forum is full of aviation experts who can help you to answer any questions you have about anything related to airliners and aviation and meteorology.
Where would you like to start?
I would start with the following:
"How do the materials carried in the cargo compartment get sprayed out?
Where are the tubing and pumps mounted in the aircraft?
There is no room on the back of the rear wing spar to route additional tubing- there are hydraulic lines and actuators in the way (I can provide pictures).
So where is this tubing located? Where are the “spray nozzles”? (They aren’t in any of the pictures of this exact same aircraft):
http://www.airliners.net/search/photo.search?aircraft_genericsearch=%22boeing+747-8%22&airlinesearch=&countrysearch=&specialsearch=&daterange=&keywords=n853gt&range=&sort_order=photo_id+desc&page_limit=120&thumbnails=
https://www.google.com/search?q=n853gt&safe=off&biw=1243&bih=574&tbm=isch&tbo=u&source=univ&sa=X&ei=yblJVJnsD-a68QH2-IDYAw&ved=0CCoQsAQ
Why would DHL pay money to have illegal equipment added to their aircraft, increasing maintenance complexity, weight (and therefore fuel costs).
Why would DHL, a corporation that exists to make maximum profit, spend one additional cent for something they do not need to make maximum profits?
What would their shareholders think?
What is DHL’s motivation for spending money and for risking their entire operation’s FAA certificate to “spray chemicals”?
A Boeing 747-8 is a BRAND NEW aircraft!
That means that Boeing would have had to install the “spray system” in violation of FAA regulations and the FAA type certification of the 747-8.
Would Boeing risk their aircraft manufacturing certification for this?
I worked in the Boeing widebody factory in Everett, WA assembling 747-400 and 777-200 wing sections. One time I helped another mechanic install spoiler actuators to the rear spar of QANTAS 767-300 line number 310. There was no spray equipment- just hydraulic lines. (The "chemtrail" movement in Australia actually blames QANTAS for being complicit in "spraying")!
Everything we do is checked by QA and the FAA. Every job, every component, has a work order and is installed for a reason under close supervision.
All 747-8 passenger models are basically identical, structurally and in systems.
From my first-hand experience I can tell you that the freighter models have more strengthening in the seat tracks that are mounted to the top of the center wing section.”
If we can answer all these questions and also explain why the contrails are not contrails, then we can move forward with proving “chemtrails”. But there has to be EVIDENCE.
If there is no evidence, then this theory will forever remain a theory- a completely implausible theory which violates science and observable evidence.
If you'd like to attempt to provide the very first piece of "chemtrail" evidence EVER to exist: Take a glass jar and lid and go skydiving.
They’ll dump you out at 14,000’. After you are WELL clear of the exhaust of the aircraft that dropped you, let your jar fill with air and then seal it. Don’t drop it!
Have it tested in a lab.
What’s in it?