US President Barack Obama and his wife Michelle on Monday paid tribute to the Father of the Nation Mahatma Gandhi when they visited Rajghat, the memorial to the president's 'real hero'.

The visiting president jotted down a long note in the visitor's book while his wife stood beside him. The first couple were later presented a bust of Gandhi and a khadi scroll containing the seven social sins Gandhi wrote about in 'Young India' in 1925.