 Complete the following phrase:  On 24 September 1955 the squadron was reformed at RAF Gaydon to operate the Vickers Valiant for reconnaissance duties. It moved to RAF Wyton in November 1955. The squadrons official war role was to carry out pre- and post-strike reconnaissance in support of the RAFs nuclear-armed V-bombers, although the post-strike bomb damage assessment mission was soon abandoned as impracticable in a nuclear war. The squadron carried out frequent long-range survey flights, including mapping Thailand in 1959 and 1961 in Operation Segment, and surveying Northern Rhodesia, Southern Rhodesia and Bechuanaland now Zambia, Zimbabwe and Botswana respectively in 1964 in Operation Pontifex. Other photo survey duties were carried out to aid relief efforts following natural disasters, with Valiants despatched to survey the damage following the 