U.S. Army tanks, foreground, at Checkpoint Charlie, and Soviet Army tanks, opposite, face each other in the most dangerous of several crises at the Friedrichstrasse checkpoint in Berlin during the Cold War, Oct. 28, 1961. The armor remained in position for more than 16 hours at one of the few crossing points in the wall that divided Communist East Berlin and West Berlin. The Russians retreated to a ruined royal palace while the Americans moved to a bombed site. (AP Photo/Kreusch) PA-7608487
