U.S. Undersecretary of State Nicholas Burns gestures as he walks back after his meeting with India's Foreign Secretary Shiv Shankar Menon in New Delhi May 31, 2007. India and the United States are close to sewing up a landmark but controversial nuclear energy deal although some hard work needs to be done to bridge major differences, a top U.S. official said on Thursday. REUTERS/B Mathur (INDIA)