Prime Minister Narendra Modi on Tuesday engaged in wide-ranging bilateral talks with US President Barack Obama after arriving at the White House here. This is the seventh meeting between Modi and Obama in the past two years. PM Modi while addressing a gathering said that India's youth power in partnership with US will help to serve mankind. "Will meet again in G20 and will fulfill the dream of climate justice. Our friend Obama extended support to MTCR and NSG for which I will always be grateful," said Modi.