Washington: India allowed the US to use one of its air bases for refuelling the CIA's U-2 spy planes to target Chinese territories after its defeat in the 1962 war, a declassified official document said on Friday. The then Indian Prime Minister, Pandit Jawaharlal Nehru, approved overflight by U-2 missions covering the border areas with China on November 11, 1962, the independent National Security Archive (NSA) said in a report based on the latest set of declassified documents it obtained from the CIA under the Freedom of Information Act.