In the latest twist in an escalating trade war between the US and Canada, Donald Trump announced doubling tariffs on Canadian steel and aluminium to 50 percent only to halt them hours later, after Ontario's premier Doug Ford suspended a planned 25 percent surcharge on electricity exports to the United States. This led to another chaotic trading day on Wall Street. Plus, embattled Japanese carmaker Nissan has announced a management reshuffle: Ivan Espinosa is to replace Makoto Uchida as CEO next month.