Britain gives Putin until midnight to explain nerve attack on former spy

Britain gave President Vladimir Putin until midnight on Tuesday to explain how a nerve agent developed by the Soviet Union was used to strike down a former Russian double agent who passed secrets to British intelligence.Sergei Skripal, 66, and his daughter Yulia, 33, have been in hospital in a critical condition since March 4 when they were found unconscious on a bench outside a shopping centre in the English cathedral city of Salisbury.Prime Minister Theresa May said it was "highly likely" that