Freak Afghan hailstorm grounded scores of Nato helicopters

A freak hailstorm over one of the biggest Nato airbases in Afghanistan grounded more than 80 helicopters, putting several of them out of action for more than three weeks, it has emerged. The half-hour storm in late April split rotor blades, cracked windows, ruptured the choppers' metal skin and damaged other parts. The hail was so intense that after an intensive repair programme eight of the choppers were still inoperable more than three weeks later, according to a Nato spokesman.

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