Mexican stocks fell sharply on Monday to a one-week low as concerns that Spain may need an international bailout weighed on riskier assets around the world.
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Among those murdered was Keith Palmer, an unarmed constable who "did his job and never wanted any fuss."
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.