A chain smoker (of Chesterfield cigarettes), Oppenheimer was diagnosed with throat cancer in late 1965. After inconclusive surgery, he underwent unsuccessful radiation treatment and chemotherapy late in 1966. On February 18, 1967, he died in his sleep at his home in Princeton, aged 62 years. A memorial service was held a week later at Alexander Hall on the campus of Princeton University. The service was attended by 600 of his scientific, political, and military associates, including Bethe, Groves, Kennan, Lilienthal, Rabi, Smyth, and Wigner. His brother Frank and the rest of his family were there, as was the historian Arthur M. Schlesinger Jr., the novelist John O'Hara, and George Balanchine, the director of the New York City Ballet. Bethe, Kennan and Smyth gave brief eulogies. Oppenheimer's body was cremated and his ashes placed in an urn, which Kitty dropped into the sea within sight of the St. John beach house.