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Concerns grow about Russia's thermobaric weapons: https://t.co/V3vXmUDAic • Ukraine ambassador said Monday that Russia had used a vacuum bomb • A first charge spreads an aerosol, a second charge ignites the aerosol fog, creating a huge blast and vacuum as oxygen is sucked up https://t.co/7Bw1LQvQn9 — PolitiTweet.org