BENGALURU, Feb. 9 -- The Chief of the Air Staff Air Chief Marshal AP Singh and army chief General Upendra Dwivedi will on Sunday fly in a two-seater trainer version of the Tejas light combat aircraft (LCA-Mk1) from the Yelahanka airbase in Bengaluru, signalling jointness in the armed forces and the air force fully backing the locally produced fighter jet, officials aware of the development said on Saturday....