Top European firms warn on Brexit

The leaders of 50 of Europe's mightiest companies, from Shell and BP to Heineken and BMW, warned Tuesday that Britain will be weaker if its people vote to break away from the European Union. A united Europe benefits investment and job creation, they said. The Europe Union is the world's largest economy, accounting for 16 percent of world trade, which gives it "tremendous bargaining power" in striking trade deals, the company chiefs said.