A Boeing 787 Dreamliner operated by United Airlines
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Dreamliners grounded amid safety concerns

All of Boeing's 50 flagship 787 Dreamliners have been temporarily taken out of service amid safety concerns.

It follows a smoke alert on a flight in Japan on Wednesday - the latest in a string of incidents over the last few weeks.

The US and European aviation agencies said planes should be grounded while safety checks are carried out on their lithium ion batteries.

Richard Westcott reports.

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