It's clearly the first line of a deeply rooted plot. These plants, when fully grown, will be identifiable from special satellites. They just have to get enough unwitting people planting them as well to make the strategic plants from sticking out.
That's just a hoax of an investigation. Tumble weeds were from the wild west days. It too was clearly part of the plot from China. As they built the railroads, they were doing their version of Johnny Appleseed dropping the tumble weed seeds. The whole of the US Southwest was a lush garden like area until these tumble weeds took over and turned it into a desert.
