President Obama will become first sitting U.S. president to visit Myanmar . U.S. Secretary of The United Nations Obama visited country in the past year and a half . Uncertainty remains for U.S. as ethnic violence continues in Rakhine state .
President Obama will become first sitting U.S. president to visit Myanmar . U.S. Secretary of State Hillary Clinton visited country in December 2011 . Uncertainty remains for Myanmar as ethnic violence continues in Rakhine state .