When a person or collective entity (such as a nation) chooses to "pull the trigger" on violence or other irrevocable action, one astrological transit appears with stunning regularity. It is, of course, the Pluto-to-Pallas transit. In the astro-weather for the day of the shoot-down against Turkey's chart:
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Here we have transiting Pluto conjunct Syria Pallas, semisextile progressed Pallas, and square solar arc Pallas. Russia is currently experiencing a similar transit, but one not nearly as strong.