Moscow is mulling whether to offer Greece natural gas supplies while Athens struggles with its European creditors.
Russian President Vladimir Putin held up the summit as evidence Moscow is not isolated in the world.
France canceled the delivery of the two Mistral ships in November because of the Ukraine conflict.
Facebook banned several prominent Russian journalists and bloggers for using a slur for Ukrainians, leading many to delete their accounts.
The U.S. should consider arming Ukraine to combat "Russian aggression," said Gen. Joseph Dunford, the Joint Chiefs Chairman nominee.
Both countries have increasingly displayed military aggression in their respective regions of the world.
Russian Prime Minister Vladimir Putin told Indian Prime Minister Narendra Modi he's ready to do yoga.
The U.S. wants NATO allies to commit 2 percent of their GDP on defense to combat Russia, which is seen as the biggest threat to U.S. security by Air Force Secretary Deborah James.
Russia is also developing a new class of anti-air destroyers called “Leader.” The Russian navy is expected to get 12 Leader-class warships by 2025.
"The war for us never ended. We never ran from our war with Russia, and we never will," said a former Chechen warlord fighting in Ukraine.
While Greece contends with its increasingly fragile economic circumstances, Russia is circling to pick up the pieces.
The first submarine, known as the "aircraft carrier killer" will carry cruise missiles.
Up to first five investment deals are expected to be signed in the next three months and attract partners from China, South Korea and the UAE.
But Berlin wants to see Russia and Ukraine meet the terms laid out in the Minsk II agreement first.
The entire Su-24 fleet was grounded after one of the aircraft crashed in far eastern Russia, killing both pilots.
The number of internally displaced people in Ukraine has climbed to nearly 1.4 million as the war with Russian-backed rebels takes its toll.
The EU's unity, solidarity and international standing are at risk from Greece's debt, Russia's role in Ukraine, Britain's pursuit of opt-outs and Mediterranean migration.
Countries pushing for justice over the downed airliner face a difficult task to persuade UN veto-holder Russia to cooperate in bringing suspects to trial.
Under the Minsk ceasefire agreement signed last February, any rebel elections would require oversight from the Ukrainian government in Kiev.
Moscow is arming many of its former Soviet allies as it looks to continue moves out of recession while also building up support against NATO.
The proposal "considerably narrowed" the circumstances under which Ukraine could hold nationwide referenda, a top official said.
A private U.S. company wants to help Ukraine produce its own enriched uranium to fuel its nuclear power and rely less on Russia.