HONOLULU — How President Barack Obama spent the second day of his Christmas vacation on Sunday in Hawaii:

_ INOUYE FUNERAL: Obama and first lady Michelle Obama attended a memorial service for U.S. Sen. Daniel Inouye at the National Memorial Cemetery of the Pacific, sitting in the front row with Inouye's widow.

_ PAYING RESPECTS: After the service, Obama briefly visited the grave of his grandfather, World War II veteran Stanley Dunham.

_ HIKING: The first family went on a hike to Maunawili Falls, a popular, easy trail in Kailua near the Obamas' vacation home that leads to a waterfall and swimming hole.

Related on HuffPost:

Loading Slideshow...
  • Michelle Obama with Bo at the White House

  • Michelle Obama at the White House

  • Michelle Obama at the White House

  • Michelle Obama at the White House

  • Michelle Obama at the White House

  • The Gingerbread White House

  • Michelle Obama at the White House

  • Michelle Obama, Sasha and Malia Receive the White House Christmas Tree

    The First Lady, Michelle Obama along with her daughters Sasha and Malia and dog Bo is presented with the White House 2012 Christmas Tree, which will be displayed in the Blue Room of the White House.