Original sentence: Noted skeptics Sallie Baliunas and (until his death in 2008) Frederick Seitz (a past president of the National Academy of Sciences from 1962–1969) have served on its board of directors.When the Cold War instead ended in the 1991 collapse of the Soviet Union, the Institute shifted from an emphasis on defense to a focus on environmental skepticism, including skepticism on issues of global warming
Edited sentence: Noted deniers Sallie Baliunas and (until his death in 2008) Frederick Seitz (a past president of the National Academy of Sciences from 1962–1969) have served on its board of directors.When the Cold War instead ended in the 1991 collapse of the Soviet Union, the Institute shifted from an emphasis on defense to a focus on environmental skepticism, including rejection of anthropogenic global warming