We had provided enough evidence for 26/11 terror attack in Mumbai and we are STILL waiting for Pakistan to turn up those who are responsible. When India asked the help of US ( remember when that happened you were still engaged on a 'global war on terror') Why didn't US did nothing next to little to help India ? Not only 26/11 I can put forth many examples and you pretty much would know all that so leaving with just 26/11. Even USA didn't allow access to David Headley for Indian Intelligence agencies which could have helped India.
I can point out many more but considering India-US relations grew stronger in the last decade I haven't taken other issues. So please explain to me the stance of USA in the above issues.