UK police say they are investigating a knife attack on a woman in a London park, with online footage showing she was wearing a T-shirt with a cartoon from Charlie Hebdo, the French magazine targeted by jihadists. The 39-year-old woman was treated in hospital for a minor slash injury after the attack on Sunday afternoon at Speakers Corner in Hyde Park, the Metropolitan Police say. Footage posted on YouTube showed a man in a hooded top approach a woman holding an umbrella and stab her, apparently several times. The man then takes off his hood and leaves. […] Police do...