LEADER OD VIETNAMS REBELS SAIGON, SOUTH VIETNAM:A photo from file of MAJOR GENERAL DUONG VAN MINH known as " Big Minh" who is reportedly leader of the rebel coup in South Vietnam. Yesterday he urged the people of South Vietnam to Co-Operate with the army to prevent communists from exploiting the situation. A broadcast by radio Saigon heard in Singapore today said that president Ngo Dinh Diem of South Vietnam and his brother and chief aadvser , Ngo Dinh Nhu, committed suicide at 10.15 am today. (3.15am G.M.T) 2nd November 1963