Riot police have apparently fired tear gas at striking metro workers in Sao Paulo, three days before the World Cup kicks off in the city.
Correspondent Lulu Garcia-Navarro, for the public radio network NPR, tweeted this picture:
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Sadly, these high-school students have already received the most abrupt and cynical lesson of their lives.
A top temperature of 9 or 10 Celsius (48-50 F).
The poll comes ahead of a debate in the House of Commons on Friday on a new Bill which would introduce such a system in England.