FILE — Dr. Alondra Nelson, deputy director of the Office of Science and Technology Policy, speaks at the Queen Theater in Wilmington, Del., on Jan. 16, 2021. Nelson said that scientists across the government would review “Trump-era policies that eschewed science for politics” and develop new safeguards, the first step in what White House officials described as a sweeping effort to rebuild a demoralized federal work force and prevent future abuses. (Amr Alfiky/The New York Times)