External Affairs Minister S M Krishna said, the United States is aware of India's concerns with regard to Pakistan and is not going to do anything that would adversely affect its interest. Talking to reporters at the end of his four-day trip to Washington, Mr Krishna said, the US Secretary of State Hillary Clinton is quite aware of India's various concerns with reference to Pakistan and this has been discussed at official level in greater details. In response to a question, he said, strengthening of the strategic relationship with the US is not at the cost of any third country.<br/>