Indo-US military ties on good track: Pentagon

US Deputy Defence Secretary Ash Carter has made several trips to India, he said, referring to what is now being called as the 'Carter-Menon' initiative, which resulted in the US going out of its way to provide India access to technologies that are being given to only to its closest allies.   Notwithstanding some "barriers" and "challenges" in Indo-US defence ties, the two countries are on a positive trajectory to step-up military-to-military cooperation, a top American commande…