Deprived of political influence, Oppenheimer continued to lecture, write, and work on physics. He toured Europe and Japan, giving talks about the history of science, the role of science in society, and the nature of the universe. Oppenheimer was warmly received during his three-week lecture tour in Japan in 1960, just 15 years after the bombings of Hiroshima and Nagasaki. He indicated interest in seeing Hiroshima, but the Japan Committee for Intellectual Interchange, which sponsored the tour, decided it would be best not to stop at Hiroshima or Nagasaki, and Oppenheimer never went to either city. In 1963 he spoke about the importance of studying the history of science at the dedication of the Niels Bohr Library and Archives of the American Institute of Physics.