Which German-born engineer helped develop the V-2 rocket during World War II and became a U.S. citizen in 1955?

Born in Nice in 1807, when it was part of France, which leader of the "Redshirts" played a leading part in unifying Ita… Born in Genoa in 1782, which violin virtuoso played so well that listeners thought he was in league with the devil? Born in Germany in 1685, which composer settled in England and died in London on April 14, 1759? Born in Germany in 1879, which scientist became a Swiss citizen around 1901 and a U.S. citizen in 1940? Born in Ghana in 1938, which UN Secretary-General won the Nobel Peace Prize in 2001? Born in Grand Rapids in 1935, which astronaut died along with Gus Grissom and Ed White in the 1967 Apollo 1 fire? Born in Green Forest, Arkansas, in 1922, who became editor of Cosmopolitan magazine in 1965? Born in Hamburg, who served as West German chancellor from 1974 to 1982 before Helmut Kohl?