Russia's military posture a growing threat to the U.S.;

Crimean development slows amid economic downturn  

Coming clean on Crimea;

A step forward in the Arctic, and a step back on energy  

An increasingly costly Ukraine policy;

Speedy arrest of suspects in Nemtsov's murder  

Ripples from Nemtsov's murder;

Hungry in Russia  

Advances in the Arctic, and the Eastern Mediterranean;

Nemtsov killing rocks Russia