File photo shows National Super Alliance (NASA) leader Raila Odinga address his supporters at Uhuru Park in Nairobi, capital of Kenya, Oct. 25, 2017. (Xinhua/Nyalwash)

NAIROBI, Jan. 30 (Xinhua) -- Kenya's main opposition party, National Super Alliance (NASA), on Tuesday swore in Raila Odinga as president in a ceremony attended by thousands of jubilant supporters at the Uhuru Park.