President Vladimir Putin signs new military doctrine outlining dangers.
NATO's military chief said Russian troops were "training [and] equipping" rebels in Ukraine.
Tensions are already high between Russia and NATO amid the Ukraine crisis.
The escalation of Russian military activity demands a strategic reset of the defense budget.
The stars were aligned for Putin, but no longer.
A test case for a new relationship with Russia.
The Obama administration must move beyond merely offering words of support to Ukraine.
The official declined to identify the countries that are sending Ukraine weapons.
Earlier, Obama had spoken only of making ISIS "a manageable problem."
Sergey Lavrov called Ukrainian statements "a blatant attempt to derail all the efforts."
The White House said it had engaged “a large number of countries” in talks already.
Retired Adm. Stavridis said the U.S. would need to "triple" its ground force.
The West should instead boost its assistance to Ukraine and put more pressure on Moscow.
A GOP Congress might mean a more active and ambitious US foreign policy.
Russia has conducted military flights in European airspace in recent days.
NATO computers were targeted as early as December 2013, iSight said.
NATO's senior military officer says Moscow could move to occupy eastern Ukraine permanently.
He said the deal would ensure the "long-term security of Afghanistan."
What is our common interest? And how effective will be air strikes be?
The alliance continues to ensure the peace and prosperity on the European continent.
He said the U.S. and Europe would "broaden and deepen" measures, downplaying a cease-fire.
The U.S. has a major strategic decision to make.
Secretary-General Rasmussen did not call the action an invasion, though.
Despite this tragedy, the battlefield remains the same as it was before the crash.