Britain gives Russia 'until midnight' to explain use of nerve gas

Police officers stand guard near a forensics tent in a Sainsbury's parking lot on Tuesday, as investigations continue more than a week after the poisoning of Sergei Skripal and his daughter in Salisbury, England.
Police officers stand guard near a forensics tent in a Sainsbury's parking lot on Tuesday, as investigations continue more than a week after the poisoning of Sergei Skripal and his daughter in Salisbury, England.