Putin Playing Poker Rather Than Chess, Says Former UK Spy Chief

Why won't Russia's Vladimir Putin let Ukraine go? He might not be able to, according to a former head of Britain's MI6 external intelligence agency, Alex Younger.

In an interview Tuesday with the BBC, Younger said he cannot see how the Russian leader can back down as fears mount that Putin is poised to order a Russian invasion of Ukraine, a former Soviet republic.

Younger said the Russian president was "pla