The photograph was originally published online by Reuters/National Review in 2008 and guaranteed free non-commercial use; further information can be seen in the metadata. However, as a handout photo originally, it almost certainly emerged in the 1970s with no evident copyright notice, hence the chosen licensing information.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
Uploaded a work by Unknown photographer. from "William F. Buckley Jr., The Art of Fiction No. 146" in ''The Paris Review''. * https://www.theparisreview.org/interviews/1395/the-art-of-fiction-no-146-william-f-buckley-jr with UploadWizard