US First Lady visits school in Washington D.C. (3/7)

US First Lady Michelle Obama returns microphones after talking to students at Yu Ying Public Charter School, a chinese-immersion, International Baccalaureate, elementary school, before traveling to China, in Washington D.C., the United States, on March 4, 2014. The First Lady will visit China later in March. (Xinhua/Yin Bogu)