The Prime Minister of India Manmohan Singh and the President of the United States of America Barack Obama jointly sought for expanding security cooperation between the United States and India to address 21st century challenges in the areas of counter-terrorism, cyber, space, and global health security.    Singh and Obama met on the morning of September 27 followed by a working luncheon at the White House.    Marking their third bilateral summit, the two leaders reflected proudly on the transformation of United States-India relations during the last decade, affirming that the partnership between the two democratic nations is stronger today than at any point in their 67-year history.    Rooted in common democratic values and strong people to people ties, the United States and India have developed a comprehensive global strategic partnership, both in name and in substance that has made their citizens safer and more prosperous.    President Obama and Prime Minister Singh pledged to make the next decade equally as transformative, challenging their governments to reach the full potential of this partnership, particularly in the areas of security cooperation, bilateral trade and investment, energy and environment, higher education, and global architecture.