The Russian air force has tested a giant fuel-air bomb which the military says is the biggest non-nuclear explosive device in the world.Russian TV showed a Tupolev bomber dropping the bomb over a test range, a powerful explosion and a four-storey building reduced to rubble.
Claims it is bigger than the Moab, the US equivalent could not be confirmed but seem plausible, analysts say.
Such bombs are mainly designed to destroy underground targets.
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