President Barack Obama greets people on the tarmac before boarding Air Force One at Honolulu Joint Base Pearl Harbor-Hickam, in Honolulu, Saturday, Jan. 4, 2014, as he travels back to Washington after their annual family vacation. (AP Photo/Carolyn Kaster)

President Barack Obama greets people on the tarmac before boarding Air Force One at Honolulu Joint Base Pearl Harbor-Hickam, in Honolulu, Saturday, Jan. 4, 2014, as he travels back to Washington after their annual family vacation. (AP Photo/Carolyn Kaster)