Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds.

Police officers guard a cordon around a police tent covering the the spot where former Russian double agent Sergei Skripal and his daughter were found critically ill Sunday following exposure to an "unknown substance" in Salisbury, England, Wednesday, March 7, 2018. Britain's counterterrorism police took over an investigation Tuesday into the mysterious collapse of the former spy and his daughter, now fighting for their lives. The government pledged a "robust" response if suspicions of Russian state involvement are proven. Sergei Skripal and his daughter are in a critical condition after collapsing in the English city of Salisbury on Sunday. (AP Photo/Matt Dunham)
Police officers guard a cordon around a police tent covering the the spot where former Russian double agent Sergei Skripal and his daughter were found critically ill Sunday following exposure to an "unknown substance" in Salisbury, England, Wednesday, March 7, 2018. Britain's counterterrorism police took over an investigation Tuesday into the mysterious collapse of the former spy and his daughter, now fighting for their lives. The government pledged a "robust" response if suspicions of Russian state involvement are proven. Sergei Skripal and his daughter are in a critical condition after collapsing in the English city of Salisbury on Sunday. (AP Photo/Matt Dunham)

    JUST WATCHED

    Residents grapple with nerve agent attack

MUST WATCH

Residents grapple with nerve agent attack

Residents of Salisbury, England, grapple with the attempted murder of Russian double agent Sergei Skripal and his daughter Yulia by use of a nerve agent. CNN's Phil Black reports.

Residents grapple with nerve agent attack

Residents of Salisbury, England, grapple with the attempted murder of Russian double agent Sergei Skripal and his daughter Yulia by use of a nerve agent. CNN's Phil Black reports.