They've been openly cloud seeing here in the Texas Panhandle for years, although I can't tell that it's done a fuckin' thing other than waste money...

They don't use chemtrails though, they use Flares from prop-planes. The flares burn sending silver nitrate (I think that's right) particles into the clouds, then that is supposed to enhance rain prospects...

But we've been in the worse drought in Texas History here since 2005, so it's obviously a bunch of bullshit anyway...