New Jersey Governor Chris Christie has said he is still looking into the possibility that other members of his staff were involved in the scandal over shutting down lanes onto the busy George Washington Bridge.
Christie said he will "take action" if it is needed.
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Top temperature 14 Celsius (57 F).
The Prime Minister will say Moscow's brazen flouting of international law represents a threat to the basis of democracy across Europe.
In some cases, victims of violence and other serious crimes face long delays as forces are unable to dispatch officers promptly.