By Mark Memmott
As ceremonies in Germany continue to mark today's 20th anniversary of the fall of the Berlin Wall, here's a pop quiz. Some questions are quite easy, we think. Others may be tougher. Our source for the answers: The Newseum.
Update at 1:45 p.m. ET. NPR's Eric Westervelt has been out talking to people in Berlin today. On German, Tom Stolfer, spoke about how much has changed since "the Mauer" (the Wall) came down. As he says, the fall of the Wall was "an unbelievable event":
Update at noon ET: Our friends at NPR's Talk of the Nation will mark the anniversary today with a special broadcast looking back at the fall of the Wall. Their guests include John Sununu, who was White House chief of staff at the time, Horst Teltschik, who was national security adviser to then-German chancellor Helmut Kohl, and former secretary of State Madeleine Albright.
Talk of the Nation goes on the air at 2 p.m. ET. Click here to find an NPR station near you.