There's a potential new era in European security. 

The US has got Russia to the table to reach three key agreements, including reinstating ambassadors to each other's countries during high-level talks in Saudi Arabia. 

Neither Ukraine nor Europe were invited. 

Senior Russian expert at Britain's Chatham House think tank, Keir Giles told Mike Hosking these are historic moments. 

He says it's a huge upset to the assumptions under-pinning Euro-Atlantic security and the United States' place in the world. 

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