On countering the threat of terrorism, Obama said he will do this by building new partnerships and would send troops into war zone only with a clear mission.
Obama became a media darling and one of the most visible figures in Washington, with two best-selling books to his name -- The Audacity of Hope and Dreams From My Father.
The Democrat, whose first name Barack in Arabic means 'the blessed', was hard pressed to fend off rumours that he is a Muslim and asserted that he is a practising Christian.
Obama is married to lawyer Michelle and the couple have two daughters -- 10-year-old Malia and seven-year-old Sasha.
Image: Obama and his wife Michelle depart a service at St John's Episcopal Church.
Photograph: Kevin Lamarque/Reuters
Also see: 'America, we have come so far'