CNBC's Eamon Javers reports the U.S. Treasury has added additional sanctions to Russia.
Ukraine President Petro Poroshenko says the fight for Ukraine's sovereignty is a fight for global security.
Hewlett-Packard has pleaded guilty to felony charges that former employees bribed Russian government officials for a contract.
Larry Summers, Charles W. Eliot University professor at Harvard University, says that although the West is right to sanction Russia, it is "essential" to focus on what can be done for the Ukrainian economy.
Martin Schulz, president of the European Parliament, says that the EU must keep the door open for negotiations with Russia and that citizens must be made aware of the possible repercussions of sanctions.
Geoffrey Pyatt, U.S. ambassador to Ukraine, says the next round of U.S. sanctions against Russia will focus on the energy, finance and defense sectors and that the resolution of this conflict is through diplomacy.
Former Ukrainian President Viktor Yushchenko says Russia is building a "huge wall" across Europe through aggressive expansion.
Ukrainian President Petro Poroshenko says the EU and US are ready to lift sanctions if Russia agrees to withdraw troops from Ukraine and close the border.
Ukrainian President Petro Poroshenko says the battle against Russia is a fight for global security.
Ukrainian President Petro Poroshenko said he is confident that the country can win back Crimea from Russia through "democratic" means.
Stefan Füle, European Commissioner for Enlargement and European Neighbourhood Policy, says the EU is ready to accept Russia's "legitimate" national interest.
Mayor of Kiev Vitali Klitschko says there is "huge potential" in Ukraine and everyone is focusing on getting peace.
Former Ukrainian President Viktor Yushchenko says Ukraine needs "military and technical aid".
Governor of Donetsk Serhiy Taruta says world leaders have not done enough to stop Russian aggression.
Viktor Shvets, Head of Strategy Research, Asia at Macquarie, explains why tensions across the Middle East and Africa pose greater risks than the Russia-Ukraine crisis.
Discussing why Fed policy trumps geopolitical turmoil when it comes to market impact, with Wayne Wilbanks, Wilbanks, Smith and Thomas Asset Management, and Jeremy Hill, Old Blackheath Companies.
The United States and its European Union allies announced Thursday that they will be increasing their sanctions against Russia.
The White House and the European Union have just announced deepened sanctions on the financial, energy and defense sectors of Russia, reports CNBC's John Harwood.
Traders are concerned that longer-term global growth will impact demand for crude oil. So will producers scale back?
I'm not trying to scare people about a particular threat but we do have to be on our guard, says Rep. Peter King, (R-N.Y.), discussing what he hopes to hear from President Obama about combating terrorist threats.