NEW : The Obamas visit Humayun 's Tomb . The president celebrates graduation with local students . U.S. President Barack Obama started his second day in India on a lighter note : pulling a few dance moves and celebrating a major religious festival with local students . Diwali is a festival of India . A day earlier , the president signed about $ 10 billion in contracts for oil exports to India .
NEW : The Obamas visit Humayun 's Tomb . The president celebrates graduation with local students . Diwali is a festival of India . A day earlier , the president signed about $ 10 billion in contracts for oil exports to India .