GCL3390046: ALEXANDER GRAHAM BELL (1847-1922) American (Scottish-born) teacher and inventor. Bell's family and a group of scientists with three boxes containing the original model of the first machine to record on wax and reproduce the human voice, which were placed in the secret archives of the Smithsonian in 1881. Photograph, 1937. / Bridgeman Images
GCL3389021: NAZIS IN VIENNA, 1938 Procession of Nazis past the Stiftgasse Gymnasium in Vienna, Austria, in 1938, in memory of the SS men who, from that location, had initiated the assassination plot against Chancellor Engelbert Dollfuss in July 1934, and were later executed following the failure of the attempted Nazi putsch. / Bridgeman Images
GCL3389022: MANFRED VON RICHTHOFEN (1892-1918). Known as the Red Baron. German aviator. Richthofen calling the pilot's attention to his downing of an Allied fighter plane over France while serving as an observer during World War I, c.1915. Illustration by Clayton Knight from 'The Red Knight of Germany,' a biography by American journalist Floyd Phillips Gibbons, 1927. / Bridgeman Images
GCL3389041: SIOUX DANCERS, c.1908 A group of Oglala Sioux women wearing feather headdresses (rear) during a dance ceremony on the Pine Ridge Reservation in South Dakota, observed by seated groups of men (center) and women (foreground). At left stands Oglala chief American Horse (1840-1908). Photographed c.1908 by Solomon D. Butcher. / Bridgeman Images
GCL3389081: DUMBARTON OAKS, 1944 Delegates from the United States, Britain, the Soviet Union, and China enjoying an outdoor lunch at Dumbarton Oaks in Washington, D.C., during the World War II conference at which representatives of the Allied governments discussed the formation of a postwar United Nations Organization, August-October 1944. / Bridgeman Images
GCL3389082: DUMBARTON OAKS, 1944 U.S. military police stand guard at the entrance of Dumbarton Oaks in Washington, D.C., at the time the mansion was host to the World War II conference at which U.S., British, Soviet, and Chinese representatives discussed the formation of a postwar United Nations Organization, August-October 1944. / Bridgeman Images