The United States today asked Pakistan to act against perpetrators of Mumbai attacks, including Jamaat-ud Dawa chief Hafiz Saeed, saying it wants to see results. Describing Lashkar-e-Taiba as a global threat, US Ambassador to India Timothy J Roemer said Pakistan should recognise the dangers and dismantle the terror infrastructure existing on its soil.<br/>Addressing mediapersons in New Delhi ahead of the Prime Minister Dr. Manmohan Singh's visit to Washington from Tuesday Mr. Roemer said, situation in Pakistan, the Mumbai attacks and cooperation in counter-terrorism will be high on the agenda when Dr. Singh meets the US President Barack Obama.<br/>AIR correspondent Manikant Thakur reports that Climate change, education and poverty-alleviation would also be among the issues of discussion of the Singh-Obama meeting .<br/>Underlining the Obama administration’s commitment to the nuclear deal, the US envoy said the deal brought a lot of trust and confidence into the bilateral relationship and described it as a win-win situation for both the countries. The US envoy identified three remaining steps as a civil liability legislation, which the Indian parliament is expected to take up soon, licensing of US nuclear companies to do nuclear business with India, and an agreement to enable New Delhi to reprocess spent fuel through the transfer of appropriate technologies. Dr.Manmohan Singh's four-day state visit – the first state visit of the Obama administration – is expected to unveil a new framework of strategic partnership revolving around expanded cooperation in areas ranging from counter-terrorism and climate change to energy and food security.The two countries last year signed the 123 bilateral civil nuclear cooperation agreement that allows India to import civil nuclear equipment and fuel after a gap of over three decades. To facilitate atomic trade, the Obama administration wants an assurance from the Indian government to American nuclear companies that the nuclear equipment will not be misused or proliferated.<br/>In a related development New Delhi today made it clear that it objects any move to give a wider footprint to China in the region by the US. The Ministry of External Affairs said that it had objections to US President Obama giving China a greater role in South Asian affairs and added that a third country’s role cannot be envisaged in the bilateral relationships between countries of the region.<br/>The MEA further said, a role for a third country in the region was not necessary and India was committed to resolving all issues with Pakistan bilaterally. <br/>The US and China had on Tuesday voiced support for the improvement in Indo-Pak ties and their readiness to promote peace and stability in the region. A joint statement issued at the conclusion of Obama's talks with his Chinese counterpart Hu Jintao in Beijing listed the situation in South Asia among regional and global challenges.