Mourners have arrived for the funeral of six-year-old Jack Pinto, who was killed in the Sandy Hook Elementary shooting.
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The Novichok incident in Salisbury has turned into an international diplomatic crisis. But how bad could things get? Adam Shaw reports.
Among those murdered was Keith Palmer, an unarmed constable who "did his job and never wanted any fuss."
Top temperature 14 Celsius (57 F).