US, China flex muscles at G20 meeting

Tensions over trade surfaced on the first day of a G20 meeting of finance ministers on Monday as the United States and China -- whose differences are fueling fears of a trade war -- flexed their muscles in the Argentine capital.The meeting of the world's leading economies in Buenos Aires comes days before US tariffs on steel and aluminum are due to come into force on Friday for all countries except Canada and Mexico.The main focus of the talks is the threat of a trade war between the US and its