Ukraine crisis tops Obama's agenda for Europe visit
He'll spend four days in Europe, culminating with a D-Day commemoration that features a lunch with world leaders - including Russian President Vladimir Putin
War in Ukraine
Hundreds of pro-Russian separatists attack Ukraine guards
5 rebels dead after hundreds of gunmen storm a border guard camp in Luhansk, near the Russian border
Confirmed: Russian fighters helping insurgents in eastern Ukraine
Pro-Russian militias confirm there are Russians fighting among them and say they expect more help to come from Russia
Separatists shoot down Ukrainian military copter
Fighting grows more intense in eastern city of Slavyansk as pro-Russians in city confirm they're holding 4 European observers
In eastern Ukraine, residents fear threat of civil war
Government supporters welcome action against separatist militias, but worry that fighting will escalate
Russian citizens not hiding among Ukraine insurgents
Separatist leaders confirm what has been an essentially open secret: that foreign militiamen are spilling across the border
Fighter jets drop new reality on eastern Ukraine
For 1st time, Kiev has unleashed the big guns, leaving pro-Russian separatists in need of help that may be vanishing
Scores killed in battle to control Ukrainian airport
Fierce fighting continues after separatists launched bid to take over airport in eastern city of Donetsk
Ukraine launches airstrikes against eastern militants
Ukrainian president-elect promises to negotiate an end to pro-Russian insurgency in east; heavy fighting reported at airport in Donetsk
Can Ukraine's election end standoff with Russia?
Moscow "ready" to talk with tycoon who appears to have swept presidential vote in Kiev, and both sides seem eager to end bloodshed
Poll: Billionaire candy maker wins Ukraine presidential election
Petro Poroshenko, allegedly the ninth richest man in Ukraine, dominated the field in an exit poll; known for ability to strike compromise
Putin: Russia will "respect" Ukraine election results
Moscow's recognition of nationwide elections significant, but comes as pro-Russian separatists threaten the vote in some eastern areas
Separatists kill 11 Ukrainian troops at checkpoint
Pro-Russian militants reportedly ambushed soldiers near Donetsk and mowed them down at close range in deadliest clash in weeks
Ukraine sees tensions with Russia ease a bit
But pro-Russian insurgents are trying to derail Sunday's vote, and NATO says Russian troops remain on border
Pro-Russian rebels in Ukraine face anger from residents
Country's richest man vows to challenge insurgents
Russian army readies return from Ukrainian border
Moscow says some troops dismantling camps along border; locals in east Ukraine increasingly angry with pro-Russia separatists
Putin orders troops near Ukraine back to bases, again
Kremlin says forces deployed near border ordered back to their home bases, but NATO official says still no evidence of movement
Putin visiting China, says bolstering ties "of paramount importance"
Amid strained ties with the West over Ukraine, Putin signals deal on Russian natural gas exports to China is close to be signed
Crimean Tatars say they face "new threat" to existence
During rally to commemorate Stalin's brutal 1944 deportation of Crimea's Tatars, some claim there is renewed Russian attempt at cleansing them from peninsula
Ukraine's richest man does what gov't forces couldn't
When Rinat Akhmetov realized his business in Mariupol was at risk, it didn't take him long to send the pro-Russian separatists packing
Kerry threatens Russia with new sanctions over Ukraine
Secretary of state hopes Russia will play constructive role in upcoming presidential election
Putin: Ukraine must pre-pay for gas starting in June
Russian president raises pressure on neighbor as Moscow accuses Ukraine of being reluctant to implement international peace plan
Oversight leaves unclear what Ukraine talks will accomplish
Ukraine government's main foes excluded from talks that are part of European-backed peace plan
U.S. cancels delegation to Paralympics in Russia
White House won't send presidential delegation to Paralympic Games in Sochi in retaliation for Russia's military advances in Ukraine
Russia, Ukraine militaries: Unequal opponents, divided loyalties
Russian military much more powerful; Ukraine forces stationed in Russian-speaking regions don't necessarily support government in Kiev
World
U.S. embargo, sanctions on Cuba impacting power, access to medicine
Photos show pope celebrating Mass at hospital after cancer surgery
American journalist injured in West Bank clashes
Live
Iran's president denies nuclear ambitions, says he's ready for talks
Exclusive
Ousted general warned of missile defense shortage before Iran war
White House prepares plans to use "mother of all bombs" on Iran
Farmer's discovery in Egypt leads to pieces of statues for ancient king
Pope Leo resumes some papal duties after surgery, Vatican says
