Lucknow: IAF's aerobatics team Surya Kiran rehearses for the Defence Expo 2020, in Lucknow, Sunday, Feb. 2, 2020. Prime Minister (PM) Narendra Modi is expected to inaugurate the mega event, to be held from Feb. 5 to Feb. 9.(PTI Photo/Nand Kumar) (PTI2_2_2020_000107B)