Police attempt to break up a student protest in a subway station against the country's latest round of transport fare hikes, in Sao Paulo, Brazil, on Tuesday. Amid a marked economic downturn and high inflation, bus fares went up in Sao Paulo, Brazil's largest city, from 3 ($1.17) to 3.50 reais, and in Rio de Janeiro, the former capital, from 3.0 to 3.40 reais. Rio's 13 percent hike is almost exactly double the current rate of inflation. Photo: AFP