The US National Transportation Safety Board has said it is investigating today's crash at Aspen airport in the state of Colorado:
NTSB investigating today's crash of a Canadair CL-600 in Aspen, CO.
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America says it has "identified preparations" for an attack similar to that which killed at least 86, including 30 children, in April.
Despite the rain it will still feel muggy with highs of 22C.