So, I use this ASTER data occasionally to look at likely areas of prospectivity, rarely do I select Aluminium because it mostly just tells me the rocktypes, which I already know...But after seeing (and being astounded by) the "chemtrails" claims, specifically Aluminium in soils, which as I'm sure you are all aware, is the third most common element in the Earths crust....I had a look at Al levels over my own little bit of the globe that I dwell on...and yeah as expected, no discernible patterns, trends or features that correspond to anything other than rock-types. If vast amounts of aluminium was being dumped by aircraft, then there would be trends matching the prevalent wind directions or at the very least, a complete obliteration of the natural signatures in the soils. IDK if you have access to ASTER data in the US, but some friendly US geologist should be able to find it easily and debunk the whole Aluminium story...http://strike.nt.gov.au/;jsessionid=1mkvx00yazwfs1245zls5pw1c7 select the ASTER imagery tab at the bottom and tick AlOH composition + content tabs....Maybe someone a bit more Savvy than me can get some screen dumps + overlay flight path data?