Russia and Ukraine failed to reach an accord on gas supplies for the coming winter in talks on Tuesday.» Read More
Speaker of the House John Boehner called Russian President Putin a "thug."
CNBC's Steve Sedgwick and Michelle Caruso-Cabrera discuss the huge amount of tension in Ukraine, and how significant the country is economically.
CNBC's Steve Sedgwick reports from Kiev, Ukraine, on the events taking place in Crimea. The Ukraine Prime Minister urges Russia's Putin to stop its forces in Ukraine.
Art Cashin of UBS Financial Services explains the indirect route by which the Ukraine crisis is affecting stocks.
Russian television isn't pulling any punches when it comes to what it thinks about Ukraine and the United States.
CNBC's Michelle Caruso-Cabrera reports on the situation in Crimea, and the impact to the global markets.
Discussing the impact of unrest in Ukraine on the global economy, with Dan Greenhaus, BTIG; Gemma Godfrey, Brooks Macdonald; and the FMHR traders.
CNBC's Steve Sedgwick reports from Kiev, Ukraine, on the economic malaise there.
Richard Haass, Council on Foreign Relations president, discusses the standoff in Ukraine and what is likely Vladimir Putin's next move.
Secretary of State John Kerry is on his way to Kiev, Ukraine, reports CNBC's John Harwood.
Luxury stocks fell after Russia's invasion of Crimea raised the risk that European governments could impose visa restrictions on Russian shoppers.
Former Chairman of Goldman Sachs Asset Management, Jim O'Neill shares his opinions on sanctions against Ukraine and weighs in on how the G8 can pressure Russia. "G8 doesn't serve any useful purpose in the modern complex world," O'Neill says.
Jim O'Neill, former chairman of Goldman Sachs Asset Management, discusses how global markets are likely to react to the Ukrainian crisis and why it's logical for Germany to take the lead on an economic approach with Ukraine.
CNBC's Simon Hobbs shows how Europe is reacting to tensions in Ukraine.
NBC's Jim Maceda reports the chief commander of Russia's Black Sea Fleet has issued an ultimatum to Ukrainian forces to surrender or be subjected to an armed assault.
Andrew Foxall, director of the Russia Studies Center at the Henry Jackson Society, says that Russia's actions were "pre-planned".
CNBC's Michelle Caruso-Cabrera discusses the economic impact the Ukrainian crisis is having on the Russian economy.
Ukrainian Prime Minister Arseniy Yatsenyuk believes a political and diplomatic solution can be reached, reports CNBC's Steve Sedgwick.
Russia has sent troops to occupy Crimea. NBC's Jim Maceda discusses what leverage the U.S. and the EU have over Russia.
NBC News Correspondent Jim Maceda reports Russian forces have occupied Crimea's airports, ferry ports and telecom towers.