Mikhail Khodorkovsky is back to challenge Putin’s grip on power. Once Russia’s richest man and head of energy giant Yukos, he spent a...

Khodorkovsky, the richest Russian, challenges President Putin. A fight of the titans begins. Putin warns him. But Khodorkovsky comes back to Russia...

The strange case of Mikhail Khodorkovsky — once believed to be the wealthiest man in Russia — who rocketed to prosperity and prominence...