Led Zeppelin donates proceeds of their concert in Hiroshima to the victims of the first atomic bomb in 1945. The mayor, Setsuo Yamada, presents the band with a letter of appreciation and a city medal as a token of friendship. https://www.ledzeppelin.com/show/september-27-1971
Letter Translation:
To The "Led Zeppelin":
The City of Hiroshima extends to you its profound appreciation for your warm sympathy for the relief of our atomic-bomb sufferers, and for your thoughtfulness in giving a Charity Concert for the purpose of contributing to their relief, by donating the proceeds arising therefrom to the City of Hiroshima.
September 27th, 1971
SETSUO YAMADA
Mayor
City of Hiroshima