North Korean Propaganda Photograph of prisoners of <a href="https://en.wikipedia.org/wiki/en:USS_Pueblo_(AGER-2)" class="extiw" title="w:en:USS Pueblo (AGER-2)">USS Pueblo</a>. Photo and explanation from the Time Magazine article that blew the Hawaiian Good Luck Sign secret. The soldiers were flipping the middle finger, as way to covertly protest their captivity in North Korea, and the propaganda on their treatment and guilt. The North Koreans for months photographed them without knowing the real meaning of flipping the middle finger, while the soldiers explained that the sign meant good luck in Hawaii.
Government of the Democratic People's Republic of Korea
Time Magazine, February, 1968