He Can't fly with whole army. When is the Ramayana Written. atleast 500 year back, when this world imagined about airoplane, and we have details and topics where they have explained why plane of Prathavi jerks when take off or land. why Swarg yaan does not have any jerk. I am sure people call themself Hindu have no idea about there Puran and Shashtra. I am sure if you know about your Shashtra you will never listen anything against it. We have the most scientific logics behind everything we do and believe in. No other religion have that solid base and logic for their beliefs. But the hindus who are asking for Ramsethu proof have never learned their own religions.