Phnom Penh, Cambodia (CNN) - Barack Obama became the first sitting U.S. president to visit Myanmar on Monday, praising the courage of fellow Nobel Peace Prize winner Aung San Suu Kyi while also providing a symbolic nod to initial reforms in a nation once notorious for political repression.
Later, Obama traveled to Cambodia for a summit of regional leaders and held what an aide called a "tense"meeting with the host country's prime minister that emphasized the need for improving human rights there.