Russia was ousted from the multinational group in 2014 after annexing Crimea. Trump did not mention Crimea or Russia's aggression in Ukraine in his remarks.
Ukraine has voted to impose martial law following the incident, which marks a serious escalation in tensions between the two countries.
Law enforcement initially suspected that the blast was caused by a gas canister blowing up.
Filya the lion just wanted some cuddles, so she hopped on a safari tour cart to get steal some quick hugs.
Ukrainian intelligence officials staged the reporter's death as part of a special operation to catch the people trying to kill him.
What the European Union’s 2014 Crimean sanctions can teach us today.
As Donald Trump tries to make America great again, he could be making Vladimir Putin even greater. Here’s why Vlad is bad news for the world.
This isn’t the end of a new “Cold War.” One meeting can’t erase half a year of unpredictability.