A former head of the Los Alamos National Laboratory has worked with Russia for years on securing loose nukes and upgrading facilities in the former Soviet Union. Siegfried Hecker is now writing a book about two decades of of nuclear cooperation.
Hasso Herschel fled East Germany in 1961 on a false passport. Over the next decade, he helped more than 1,000 East Germans flee by smuggling them through tunnels or by hiding them inside cars.
Integrating solar panels into a bike commuter path, a special roadway outside Amsterdam will generate power that's then funneled into the national energy grid.
The Berlin Wall separated many German families, and their anguish was visible at the former Berlin railway station — now a museum — that was the main crossing between East and West.
People in the wealthy northeastern region of Spain, many of whom harbor ambitions of independence, cast ballots in a symbolic statement. The majority voted for independence, but turnout wasn't high.
NPR's Karen Grigsby Bates talks to Berlin correspondent Soraya Sarhaddi Nelson about the festivities marking 25 years since the fall of the Berlin Wall.
Separatists in Catalonia are going ahead with an unofficial referendum on independence from Spain. They go to the polls today despite a high court order forbidding the vote.