The original content of Democracy Now! Headlines appears under the Creative Commons BY-NC-ND 3.0 License (United States). For more, including their other shows and media, visit www.democracynow.org. February 21, 2011 Yemeni President Vows Not To Quit; 12 Die in Protests ------------------------------------------------------ In Yemen, U.S.-backed President Ali Abdullah Saleh refused to step down today after 11 days of anti-government protests. At least 12 people have died in Yemen since Thursday, including a teenager protester who was killed earlier today in Yemen's southern port of Aden. .