Copyright expired; claimant International News Photo (or United Press International) did not renewal photos, published in 1950, like this photo, in 1977 and 1978. First stamped on February 17, 1950. All versions of and other unscanned portions of the back of this photo do not display the copyright notice.
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 (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.