Michelle Obama

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U.S. first lady Michelle Obama gestures as she speaks at Chengdu No. 7 High School in Chengdu in the southwestern province of Sichuan, China Tuesday, March 25, 2014. (AP Photo/Andy Wong)

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U.S. first lady Michelle Obama delivers a speech at Chengdu No. 7 High School in Chengdu in the southwestern province of Sichuan, China Tuesday, March 25, 2014. Obama spoke to rural Chinese students via web conferencing Tuesday, at her last stop of the six-day China tour focusing on education and cultural exchange. (AP Photo/Andy Wong)

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U.S. first lady Michelle Obama practices tai chi with students at Chengdu No.7 High School in Chengdu in southwest China's Sichuan province Tuesday, March 25, 2014. (AP Photo/Andy Wong)

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U.S. first lady Michelle Obama, right, chats with students after practicing tai chi with them at Chengdu No.7 High School in Chengdu in southwest China's Sichuan province Tuesday, March 25, 2014. (AP Photo/Andy Wong)

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U.S. first lady Michelle Obama practices tai chi with students at Chengdu No.7 High School in Chengdu in southwest China's Sichuan province Tuesday, March 25, 2014. (AP Photo/Andy Wong)

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U.S. first lady Michelle Obama, center left, speaks during a dialogue with students at an English language class at Chengdu No. 7 High School in Chengdu in the southwestern province of Sichuan, China Tuesday, March 25, 2014. Obama spoke to rural Chinese students via web conferencing Tuesday, at her last stop of the six-day China tour focusing on education and cultural exchange. (AP Photo/Andy Wong)

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U.S. first lady Michelle Obama meets the students as she visits an English language class at Chengdu No.7 High School in Chengdu in southwestern province of Sichuan, China Tuesday, March 25, 2014. Obama spoke to rural Chinese students via web conferencing Tuesday, at her last stop of the six-day China tour focusing on education and cultural exchange. (AP Photo/Andy Wong)