At the signing ceremony of the Treaty on underground nuclear explosions for peaceful purposes was the General Secretary of the CPSU Leonid Brezhnev. Brezhnev signed the contract. At the signing ceremony are present: Yuri Andropov, VV Grishin, AA Gromyko, AG Kirilenko, MA Suslov, and others. On the American side there is the U.S. ambassador to the USSR WJ. Stessel.