New Delhi, Feb 06 (ANI): US Ambassador to India, Richard Verma said that both countries should bring energy and persistence to overcome the obstacles towards achieving the shared objectives agreed by Prime Minister Narendra Modi and President Barack Obama. Verma added that leaders had set the tone and it was up to rest of them to take the relationship forward that involves Foreign Secretary S Jaishankar and his team, cabinets, bureaucracies and national security teams. The January 25 announcement by Obama and Modi followed six weeks of intensive talks, but few details were released beyond a framework based on India's acceptance of the principle that plant operators should bear primary liability in the event of a nuclear disaster.