Leonid Bershidsky: The Soviet Union is falling apart again
A soldier of the self-defense army of Nagorno-Karabakh carries weapons in Martakert region on April 4, 2016.
Armenia and Azerbaijan have announced a truce after three days of fierce fighting in the secessionist region of Nagorno-Karabakh, but the flare-up is proof that the post-Soviet frozen conflicts are not really frozen.
