The president and his family also attended services celebrating the Rev. Martin Luther King Jr. at Metropolitan African Methodist Episcopal Church, one of the most historic churches in Washington.

Inauguration activities kicked off on Saturday with Obama and Mrs. Obama and Biden and his wife, Jill, leading volunteers across the country in National Day of Service Activities.

Later Saturday, singer Katy Perry headlined a concert for children of military families and Washington schoolchildren, hosted by Michelle Obama and Jill Biden. Singer Usher and the cast of the TV show "Glee" were among others who performed.

Sunday evening, the Obamas will watch Latino acts at "In Performance at the Kennedy Center," which is followed by the Let Freedom Ring concert. The Red, White and Blue Inaugural Ball and Hip-Hop Inaugural Ball are also scheduled in the capital.