A European Union agreement last week was short on specifics. US commitments on reductions may not be forthcoming, making Chinese commitments also unlikely.
Exiled Poles were sent to Persia, as one woman discovers in tracing her grandmother's journey to America.
Strategists say that President Barack Obama's decision to scrap a controversial missile shield for Eastern Europe has mollified Russia, and could open the door for cooperation against common nuclear threats.
Selections from 85 immigrants tell what it means to become an American.
US Vice President Joe Biden toured Eastern Europe this week with a new missile-defense plan designed to reassure the Czech Republic and Poland that they aren't being forgotten as relations warm with Moscow.
On the 20th anniversary, film festival honors Eastern bloc movies made in the decade before the Berlin Wall's demise.
Sailboats race during the start of the 2009 Bayview Mackinac Race at Port Huron, Michigan, on July 25.
Spectators watch a traditional pig race at the Swiss agriculture fair OLMA in St. Gallen, Switzerland, on Thursday.