A photo by Al Aumuller from October 1, 1940 shows Albert Einstein becoming an American citizen. Here’s the caption from the Library of Congress photo:
“Photograph shows Albert Einstein receiving from Judge Phillip Forman his certificate of American citizenship.”
Einstein was born in Germany but decided not to return to his native country during a trip to the United States in 1933, when he realized how powerful the Nazis were getting. As a Jew, Einstein was not able to teach under new Nazi laws. He returned to Europe and arrived in Belgium, renouncing his German citizenship. He lived in Belgium and England before getting a university job at Princeton and permanently settling in the United States.
Even cooler, his Declaration of Intention form (from January 15, 1936) is also available online at the National Archives. It lists his hair colour as grey, his eye colour as brown, his height as 5″7, and his weight as 175 pounds. His photo and signature are at the bottom of the form. It states that his wife, Elsa accompanied him, but that his two grown sons (from his first marriage) were living in Switzerland. Elsa, unfortunately, died at the end of this year in December 1936.