500 days out, Rio risks Olympics cost surge as building lags

By Stephen Eisenhammer RIO DE JANEIRO (Reuters) - With less than 500 days until Rio de Janeiro hosts the Olympic Games, construction of several venues has not started and some major contracts have not even been tendered, setting the stage for a last-minute rush that will likely drive up costs. Rio 2016 may, though, end up being one of global sport's closest calls yet, resulting in a race against time that would inevitably inflate the current 40-billion-real ($13.2 billion) price tag and add