THIS IS HOW they place the checkered patterns of "Chemtrails". This CIA operation is called "Agenda 21, and is instituted to to fulfill the directive written out on the Georgia Guide Stones, in which they are telling us that we need to reduce the population of Earth to 500,000,000 (500 Million people). This involves killing off 93 % of the population on Earth by 2030. This is why they are spraying poisonous material, neuro toxins, nano particles of Aluminum, Barium Cloride, cancer microbes, nano bots that will poison us, the food we eat, the soil, the water.
Google "Agenda 21"