An expert says it may be hard, but not impossible, to prove genocide in Ukraine
Survivors react to the first-ever trial for war crimes in Darfur
U.N. removes Russia from human rights panel; Ukraine pleads for weapons
U.S. ambassador to the U.N. calls for suspending Russia from the Human Rights Council
From Nuremberg to Darfur, history has seen some war criminals brought to trial
World is seeing the greatest number of conflicts since the end of WWII, U.N. says