In the outstanding 1980s miniseries about the development of the first atomic bomb, Day One, the Hungarian physicist Leo Szilard is quoted as saying that he always keeps his suitcases packed and at the door.
He had stories dating back to before some of his admirers were born, such as the time in 1939 when he and Leo Szilard, another Hungarian scientist, persuaded Albert Einstein to write to President Roosevelt, urging the need to make an atomic bomb before the Germans did.