Spy swap would have ten people arrested in the US exchanged for a number of people in Russian jails, convicted of spying for the West.
A new Russian doctrine – which says it can use nuclear weapons preemptively against small regional adversaries – is seen either as a sign of aggression or bluster to mask insecurity.
Speculation that the Arctic Sea cargo ship seized in the Baltic in July was carrying weapons or other illicit cargo continues to swirl.
On the anniversary of the Nazi invasion of Poland, the Russian prime minister praised the "heroism" of the Polish. But he did not apologize for the subsequent Russian invasion and execution of 20,000 Polish military officers.
At least 20 people died on the sub, which media reports say was to be handed over to India.
As EU monitors arrive, new details contradict Russia's assertion that Georgia invaded South Ossetia first.
Earlier this week, Syrian president said missiles in his country could offset US-Poland missile pact.