"Super Tuesday" primaries of 2020 U.S. presidential election underway

A voter walks to fill in his ballot at a polling station during the Virginia primary in Arlington, Virginia, the United States, March 3, 2020. Polling stations opened on the U.S. East Coast on Tuesday morning, kicking off the so-called "Super Tuesday" primaries of the 2020 presidential election. (Xinhua/Liu Jie)