claim: Research is incapable of testing the validity of instruments.
evidence: Botswana National Airways was an airline based in Gaborone , Botswana .. airline. airline. Gaborone. Gaborone. Botswana. Botswana. The airline took over services from Bechuanaland National Airways which ceased operations in late 1966 .. airline. airline. Bechuanaland National Airways. Bechuanaland National Airways. The airline was formed by Johnny Gibson under the leadership of D. Morgan .. airline. airline. Johnny Gibson. John Albert Axel Gibson. After Botswana 's independence , Bechuanaland National Airways was renamed Botswana National Airways .. Botswana. Botswana. Bechuanaland National Airways. Bechuanaland National Airways. It began services on domestic and regional routes utilising Douglas DC-3 and DC-4 aircraft and later a Vickers Viscount and Fokker F-27 , which saw flights being operated from Gaborone to Livingstone and Lusaka in Zambia , and Johannesburg in South Africa .. Gaborone. Gaborone. Vickers Viscount. Vickers Viscount. Fokker F-27. Fokker F-27. Livingstone. Livingstone, Zambia. Lusaka. Lusaka. Zambia. Zambia. Johannesburg. Johannesburg. South Africa. South Africa. Services to Bulawayo in Rhodesia were commenced in October 1966 in conjunction with South African Airways .. Bulawayo. Bulawayo. Rhodesia. Rhodesia. South African Airways. South African Airways. Domestic flights were flown with a Britten-Norman Islander and a Beech Baron , with the F-27 sometimes being utilised on the Gaborone-Francistown route .. Gaborone. Gaborone. Britten-Norman Islander. Britten-Norman Islander. Beech Baron. Beech Baron. Francistown. Francistown. During 1967 , the airline began to carry diesel fuel for the Roan Selection Trust Copper mines in Zambia and a Douglas DC-4 , acquired from Philippine Airlines , was utilised in which the airline flew 32 tons of fuel daily between Francistown and Livingstone , from where it was carried by rail to the Copperbelt region .. airline. airline. Livingstone. Livingstone, Zambia. Zambia. Zambia. Francistown. Francistown. Douglas DC-4. Douglas DC-4. Philippine Airlines. Philippine Airlines. Copperbelt. Copperbelt. Following the 1968 United Nations Security Council resolution banning air transportation to and from Rhodesia , Botswana National Airways was forced to cease operations to Bulawayo .. Botswana. Botswana. Bulawayo. Bulawayo. Rhodesia. Rhodesia. United Nations. United Nations. Security Council. United Nations Security Council. The airline suspended operations in late 1969 , and was placed into receivership .. airline. airline. The bankruptcy court deemed that it would be impossible for the airline to emerge from receivership and to recover its debts , which in July 1969 totalled some 453,600 rand .. airline. airline. rand. South African rand. The company was acquired by the Government of Botswana and Burton Construction in July 1969 , and Botswana Airways Corporation was formed on 1 November 1969 .. Botswana. Botswana. Government of Botswana. Government of Botswana. The new company resumed some operations , before ceasing all operations by 1971 .