DescriptionKent State Tear Gas Trajectory Courier Journal May 5 1970A.jpg
English: Kent State University students, pictured throwing tear gas canisters back at the Ohio National Guard on 5 May, 1970, as depicted in the 5 May, 1970 Courier-Journal. Direct link here
Date
Source
Louisville, Kentucky Courier-Journal. Tuesday, 5 May 1970 edition.
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.