What a difference a couple of years makes.

In 2008, gun-wielding police commandos raided BP's Moscow offices in what many saw as an attempt to pressure the company to relinquish control of its Russian joint venture. Its American chief, Robert Dudley, fled the country after police questioned him for five hours over alleged tax fraud.

Last week Dudley was back in Moscow. Now CEO of BP, he sat smiling next to Prime Minister Vladimir Putin, who praised

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