A banner announcing a strike (greve, in Portuguese) of airport workers is seen in the Congonhas airport, in Sao Paulo, Brazil, on July 31, 2013. The strike that began on Wednesday affected the main airports in Brazil, according to local press. (Xinhua/Rahel Patrasso)

A woman walks in front of banners announcing a strike (greve, in Portuguese) of airport workers in the Congonhas airport, in Sao Paulo, Brazil, on July 31, 2013. The strike that began on Wednesday affected the main airports in Brazil, according to local press. (Xinhua/Rahel Patrasso)

People rest in front of a banner announcing a strike (greve, in Portuguese) of airport workers in the Congonhas airport, in Sao Paulo, Brazil, on July 31, 2013. The strike that began on Wednesday affected the main airports in Brazil, according to local press. (Xinhua/Rahel Patrasso)

Two men walk in the Congonhas during a strike (greve, in Portuguese) of airport workers, in Sao Paulo, Brazil, on July 31, 2013. The strike that began on Wednesday affected the main airports in Brazil, according to local press. (Xinhua/Rahel Patrasso)