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New Zealand is sending two naval vessels on a long sea journey to support Tonga as it reels from an undersea volcanic eruption and tsunami. We'll hear from one worried Tongan on the attempts to reach family cut off from communications.

The biggest US airlines have warned of a catastrophic disruption to their flights if two telecoms firms activate their 5G technology as planned on Wednesday.

The UAE says it will retaliate after a drone attack by Houthi rebels explodes an oil tanker and kills three people there, the UAE is part of the Saudi led coalition fighting the Houthis in Yemen.