Britain Threatens ‘Robust’ Response If Russia Behind Spy Poisoning

Britain has threatened a ‘robust’ response if it is proven that Russia is behind the apparent attempted killing of a former Russian double agent. Sergei Skripal and his daughter were found collapsed in their hometown in southern England Sunday, showing symptoms of poisoning, and remain hospitalized in a critical condition under armed guard. As Henry Ridgwell reports from London, the case echoes the 2006 assassination of Alexander Litvinenko, another former Russian spy.