A massive explosion rocked downtown Beirut on Tuesday, flattening much of the port, damaging buildings and blowing out windows and doors as a giant mushroom cloud rose above the capital. Video / Twitter

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ZB Political Editor Barry Soper talks small business party policy with Stuart Nash (Labour), Andrew Bayly (National), Julie Anne Genter (Green), Fletcher Tabuteau (NZ First) and Simon Court (ACT).

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