Striking workers demonstrate outside Cape Town's Green Point 2010 FIFA Soccer World Cup stadium July 9, 2009. The trade union leading the national construction strike that entered its second day on Thursday has warned other employers to avoid confrontation in wage negotiations. The pay strike has halted work at stadiums for the 2010 World Cup and poses a challenge for President Jacob Zuma, who has little room to meet the demands of union allies flexing their muscles since he took office in May. REUTERS/Mike Hutchings (SOUTH AFRICA EMPLOYMENT BUSINESS SPORT SOCCER)