VLADIMIR PUTIN

Boris Nemtsov had been due to lead a mass rally against Putin and the war in Ukraine this Sunday.

An unidentified attacker shot Nemtsov, 55, four times while he was walking near the Kremlin.

Around a quarter of Russian respondents said Russia shouldn't act if the U.S. provides weapons to Ukraine.

Amid sanctions, food prices in Russia are rising.

The Secretary of State accused Moscow of repeatedly lying about the presence of Russian troops and equipment in Ukraine.

Backed by a Russia unbowed by sanctions, Ukrainian rebels have made major gains -- and may not be done yet.

Orthodox believers in Russia and Ukraine traditionally mark the end of the week leading up to Lent by burning effigies, and Obama and Putin effigies took the hot spot this year.

Attack comes amid fears of a rebel assault on the port city of Mariupol despite week-old ceasefire.

The demonstration is being held on the first anniversary of the Euromaidan movement's overthrow of Ukraine's former President Viktor Yanukovych.

Putin told Kiev to let its soldiers surrender to pro-Russian rebels, who spurned a ceasefire in eastern Ukraine and fought their way on Tuesday into the town of Debaltseve.

“The recipe has been created, and the energy accumulated in this fuel will enable our vehicles to exceed Mach 5,” said General Dmitry Bulgakov, deputy defense minister.

Under the ceasefire agreement, the two warring sides were due to begin pulling back heavy weapons on Tuesday.

This is the first time the Russian leader is visiting an EU member state since the Ukrainian conflict.

Moscow counts about 300,000 Muslims of varied ethnicities among its nearly 17 million residents.

Americans see Russia as the nation's most critical threat, with 49 percent of those polled holding the view — up from 32 percent a year ago.

Authorities in Kiev say their troops have reported 10 incidents of shelling, but that they will not have a significant impact on the truce.

Over 5,000 people have been killed over the last 10 months in clashes between pro-Russian rebels and Ukrainian forces.

The Minsk ceasefire doesn't take effect until Sunday. That means people will still die in east Ukraine until then.

The eleventh-hour agreement could very well unravel if leaders can't hammer out solutions to the many unresolved issues.

Russia's nuclear force is set for major upgrades over the next few years, per a new Russian military doctrine.

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