By World War II, research at the AMM focused increasingly on pathology. In 1946 the AMM became a division of the new Army Institute of Pathology (AIP), which became the Armed Forces Institute of Pathology (AFIP) in 1949. The AMM's library and part of its archives were transferred to the National Library of Medicine when that institution was created in 1956. The AMM itself became the Medical Museum of the AFIP in 1949, the Armed Forces Medical Museum in 1974, and finally the NMHM in 1989. During its peak years on the National Mall in the 1960s, every year the Museum saw "as many as 400,000 to 500,000 people coming through". But after its moves to increasingly obscure and out-of-the-way sites, it fell into a period of relative neglect. By the 1990s, it was attracting only between 40,000 and 50,000 visitors a year.