Obama, Cameron vow not to be "cowed" by ISIS
As NATO summit kicks off in Wales, leaders suggest alliance should have role in countering terror group -- but what role?
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As NATO summit kicks off in Wales, leaders suggest alliance should have role in countering terror group -- but what role?
Concerns grow that rebels are aiming to seize major port; Ukrainian president says he's ready to order cease-fire if peace deal is signed
Show of support comes as Russia warns alliance against offering any kind of membership to Ukraine
Large Mistral-class helicopter carriers ordered by Russia held by President Hollande over Russia's actions in Ukraine
In Estonia, announces new U.S. military units heading to Baltics; Ukraine announcement of truce pact with Russia denied by Moscow
Fighting in eastern Ukraine has killed nearly 2,600 people and forced over 340,000 to flee their homes, according to the U.N.
President will reassure Baltic leaders nervous about Ukraine crisis and seek to shore up allied support for fight against ISIS
While the U.S. says Russia has made an "illegal incursion" on Ukrainian territory, Kiev says there are now thousands of troops at the rebels' side
Kremlin blasts EU leader over Russian president's controversial remark as Ukraine says Russian troops seen in 2 rebel-held cities
While the NATO summit in Wales is expected to focus on the situation in Ukraine, ISIS will also be a major topic of discussion
Insurgents from eastern Ukraine pull back demands and say autonomy and amnesty may be enough to strike a peace deal
Even though Moscow-backed rebels lowered peace talk demands in Ukraine, Russia's aggression there has made Europe ready itself for worse
Industrial center in southeast Ukraine widely assumed to be pro-Russian rebels' next target, but they won't be welcome there
With Russian troops amassing near eastern Ukraine, two lawmakers say the Baltic states could be next; bipartisan call for more military support to Kiev
Despite tough talk decrying Russia's increasing military involvement in Ukraine, European leaders delay hitting Moscow with new penalties
Ukrainian forces' claim comes amid threat of new sanctions against Russia, artillery attack on Donetsk
Pro-Russia separatists in control of strategic coastal town; EU foreign ministers say Moscow should be punished for invading Ukraine
The $10 billion Russian Direct Investment Fund has American and European private equity executives as advisers
Proof is mounting that Russia has sent troops, supplies to pro-Russian rebels in Ukraine, though it denies claims
NATO releases satellite imagery showing Russian combat troops inside Ukraine as Western powers fume
Fighting escalates as Ukraine and NATO claim Russians troops are in eastern Ukriane
Rebels appear to have firm grip on another key town in northeast; Ukraine president calls emergency meeting of his security council
Russia has a colorful comeback after Canadians create map delineating "Russia" and "Not Russia" to help Russian troops who keep "accidentally" entering Ukraine
Bold offensive could represent attempt to create a land link between Russia and Crimea
Ukrainian president under pressure to seek negotiated settlement and not a military victory over eastern separatists