UPA, which meanwhile grew considerably and merged with the Democratic Party of Angola to form the FNLA. The leaders of the FNLA were, however, not satisfied with the US support. Savimbi consequently established good connections with the People's Republic of China, from where even larger shipments started arriving. The USA granted the company Aero Associates, from Tucson, Arizona, the permission to sell seven Douglas B-26 Invader bombers to Portugal in early 1965, despite Portugal's concerns about their support for the Marxists from Cuba and the USSR. The aircraft were flown to Africa by John Richard Hawke – reportedly, a former Royal Air Force pilot – who on the start of one of the flights to Angola flew so low over the White House, that the United States Air Force forced him to land and he was arrested. In May 1965, Hawke was indicted for illegally selling arms and supporting the Portuguese, but was imprisoned for less than a year. The B-26s were not to see deployment in Angola until several years later. Rhodesia and South Africa Aside from the US, two other nations became involved in this war. These were Rhodesia and South Africa, both of which were ruled by the white minority. Their white-elected governments were concerned about their own future in the case of a Portuguese defeat. Rhodesia and South Africa initially limited their participation to shipments of arms and supplies. However, by 1968 the South Africans began providing Alouette III helicopters with crews to the Portuguese Air Force (FAP), and finally several companies of South African Defence Forces (SADF) infantry who were deployed in southern and central Angola. However, contemporary reports about them guarding the iron mines of Cassinga were never confirmed. Finally, there were reports that a number of Rhodesian pilots were recruited to fly FAP helicopters. However, when the first Portuguese unit was equipped with Aerospatiale Puma helicopters, in 1969, its crews were almost exclusively South Africans. Rhodesian pilots were considered too valuable by the Royal Rhodesian Air Force (RRAF) to be deployed in support of the Portuguese. The SADF had pilots and helicopters operating out of the (CCAA – Joint Air Support Centre), setting up in Cuito Cuanavale during 1968. USSR During the late 1960s the USSR also became involved in the war in Angola, albeit almost exclusively via the MPLA. While the FNLA received only very limited arms shipments from the US, and