Surrey Fire and Rescue have confirmed the death of a firefighter who was on duty at Staines fire station.
Next of kin have been informed.
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State-run television KRT showed Kim still using a walking stick as he inspected the airport being constructed in the capital.
The loss is a tragedy for this small tight-knit team that dreams of making the trip into space accessible to travellers not just astronauts.
Ryan Bowen had been planning this baby-piloted battle-mech since before his son was born.