The former first lady of the United States of America, Michelle Obama, is one of the most influential women. As first lady—the first African-American woman in that role—she helped create the warmest and most open White House in history, while establishing herself as a powerful advocate for women and girls in the United States and around the world. Through her projects and activities, she dramatically turned the way of life in families and schools towards a healthier and more active lifestyle, standing by her husband as he led America through some of its most difficult moments.