Ukraine's former president Victor Yanukovych spent more that $30 million on his personal estate before he fled for Russia. Think private zoo, crocodile skin-lined planters and a copy of John and Yoko's white piano.
A series of doping scandals involving Russian athletes has led to calls for an outright ban against the entire Russian Olympic squad. Now Russian athletes are waiting to find out whether they're going to have to sit this one out.
Historian Margaret MacMillan sees parallels between the lead-up to World War I and today's instability in the face of rising Russian nationalism. She says the West failed to appreciate Russia's feeling of humiliation after the Cold War. She warns against dangerous miscalculations and for a strong response to Putin.
Ukraine's military is starting to fight the masked, pro-Russia separatists in eastern Ukraine who have been taking over government buildings. As fears of civil war grow, there's another sign that the conflict is escalating. New, masked militias with a pro-Ukraine agenda are now training to counter the separatists.
Frequent contributor Alina Simone was born in a Russian-speaking part of Ukraine. Sometimes when she's feeling nostalgic, she goes to a Russian pirate-themed restaurant in Brighton Beach, Brooklyn -- a bastion of Russian-speaking immigrants.
Russia is the world's largest exporter of natural gas, and it has used that power before as a geopolitical weapon. But the US recently became the biggest producer of natural gas due to new fracking technology. And the US is working to use its new might to undercut Russia's sway over Europe.