I don't have research at the ready about commercial planes but I don't offhand see why the chemical canisters couldn't be fitted to any plane.
It would also make sense to use commercial because they cover the world, daily. It would be efficient.
I'm sure they could be fitted to commercial planes but then we should see them, right? Or if they're hidden the people who work on the planes should be able to tell us about them. And there should be blueprints, instructions on changing them and other documents that would prove they exist. But so far I haven't found one credible document or whistleblower.
I don't have research at the ready about commercial planes but I don't offhand see why the chemical canisters couldn't be fitted to any plane.
It would also make sense to use commercial because they cover the world, daily. It would be efficient.
Edit: errors
I'm sure they could be fitted to commercial planes but then we should see them, right? Or if they're hidden the people who work on the planes should be able to tell us about them. And there should be blueprints, instructions on changing them and other documents that would prove they exist. But so far I haven't found one credible document or whistleblower.