Which Beatle first visited the United States?

George Harrison was the first; his sister married an American and moved to St. Louis, Missouri, and he visited her there late in 1963. He noticed that Beatles records were nowhere to be found (even though they had been released on Vee-Jay and other small American labels), and a movie featuring England's biggest pop star of the time (Cliff Richard) only got second billing in theaters. He returned to England with little hope for The Beatles' success in the United States. (Time proved him wrong.)