The Brazilian government may be relieved that metro workers in São Paulo have suspended their strike. But fears remain that action will resume when the World Cup begins on Thursday. The FT's Joe Leahy explains how workers are using the tournament as a protest tool.<br /><br />For more video content from the Financial Times, visit http://www.FT.com/video<br /><br />Subscribe to the Financial Times on YouTube; http://goo.gl/vUQx5k<br />Twitter https://twitter.com/ftvideo<br />Facebook https://www.facebook.com/financialtimes
