US President Barack Obama and first lady Michelle Obama arrive at Air Force Station Palam in New Delhi Jan 25, 2015. ReutersUS President Barack Obama and first lady Michelle Obama arrive at Air Force Station Palam in New Delhi Jan 25, 2015. ReutersUS President Barack Obama hugs Prime Minister Narendra Modi as he arrives at Air Force Station Palam in New Delhi Jan 25, 2015. ReutersUS President Barack Obama hugs Prime Minister Narendra Modi as he arrives at Air Force Station Palam in New Delhi Jan 25, 2015. ReutersUS President Barack Obama walks with Prime Minister Narendra Modi upon arrival at Air Force Station Palam in New Delhi Jan 25, 2015. ReutersUS President Barack Obama walks with Prime Minister Narendra Modi upon arrival at Air Force Station Palam in New Delhi Jan 25, 2015. ReutersUS President Barack Obama walks with Prime Minister Narendra Modi upon arrival at Air Force Station Palam in New Delhi Jan 25, 2015. ReutersUS President Barack Obama walks with Prime Minister Narendra Modi upon arrival at Air Force Station Palam in New Delhi Jan 25, 2015. Reuters