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US President Barack Obama (R) meets his Russian counterpart Vladimir Putin (L)  in Los Cabos, Mexico, on June 18, 2012, during the G20 leaders Summit. Obama met today Putin at a G20 summit to discuss differences over what to do about the bloody conflict in Syria. AFP PHOTO/ RIA-NOVOSTI POOL / ALEXEI NIKOLSKY        (Photo credit should read ALEXEI NIKOLSKY/AFP/GettyImages)
US President Barack Obama (R) meets his Russian counterpart Vladimir Putin (L)  in Los Cabos, Mexico, on June 18, 2012, during the G20 leaders Summit. Obama met today Putin at a G20 summit to discuss differences over what to do about the bloody conflict in Syria. AFP PHOTO/ RIA-NOVOSTI POOL / ALEXEI NIKOLSKY        (Photo credit should read ALEXEI NIKOLSKY/AFP/GettyImages)

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Is this the new Cold War?

From Syria to Ukraine to hacking accusations, tensions between Russia and the US are rising. CNN's Matthew Chance explains how relations are changing.

Is this the new Cold War?

From Syria to Ukraine to hacking accusations, tensions between Russia and the US are rising. CNN's Matthew Chance explains how relations are changing.