India will take up with Pakistan the issue of air intrusion by a huge balloon which was shot down by a Sukhoi-30MKI after it was detected coming from across the border into the Barmer region of Rajasthan by IAF radars on Tuesday morning. Though the "commercial" balloon manufactured by a US company did not contain any suspicious payload like sensors and cameras or any explosive material, sources said it could have been used to probe Indian air defence capabilities. It's a standard military practice to fly aircraft, helicopters, drones and the like near a border to test an adversary's sensors...