Commonly know as the 'Draco probe'. These are intelligent and are Negative E.T/Government oriented. It's main purpose is to fly to high altitudes, and project a holographic projection of a plane in order to somehow start leaving a plasma trail in it's path. There is a lot more to these so called 'chemtrails' than we think. The thick plasma substance spreads and thickens leaving a blanket throughout the sky within a very short period of time in order to block out most of the sun's visibility. These draco probes have been caught on video on rare occasions see exposethenwo2012 's youtube channel in regards to this.

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