Brazil Teacher Protest Turns Violent

A member of the so-called Black Bloc anarchist group jumps a burning barricade on his skateboard, during clashes with police, at the end of a march of striking teachers that took place to mark National Teachers Day, in Rio de Janeiro, Brazil, Tuesday, Oct. 15, 2013. Police and small groups of protesters clashed in Brazil's two biggest cities Tuesday night after the end of peaceful demonstrations demanding better pay for teachers and affordable housing. (AP Photo/Renata Brito) (AP2013)

Masked members of the so-called Black Bloc anarchist group join in a march in support of striking teachers, marking National Teachers Day, in Rio de Janeiro, Brazil, Tuesday, Oct. 15, 2013. Teachers have been on strike demanding better pay for more than two months. Last week, a largely peaceful rally turned violent in Rio when small groups of masked protesters started hurling rocks and gasoline bombs at banks, stores and restaurants and set fire to a passenger bus. During the march Black Bloc anarchists tried to incite the crowd, but were kept in check by other demonstrators. (AP Photo/Silvia Izquierdo) (AP2013)

A member of the so-called Black Bloc anarchist group, wearing a gas mask, leans down to grab a rock to hurl towards police during clashes after a march in support of striking teachers took place to mark National Teachers Day, in Rio de Janeiro, Brazil, Tuesday, Oct. 15, 2013. Police and small groups of protesters clashed in Brazil's two biggest cities Tuesday night after the end of peaceful demonstrations demanding better pay for teachers and affordable housing. (AP Photo/Felipe Dana) (AP2013)

Members of the so-called Black Bloc anarchist group take cover during clashes with police after a march of striking teachers took place to mark National Teachers Day, in Rio de Janeiro, Brazil, Tuesday, Oct. 15, 2013. Police and small groups of protesters clashed in Brazil's two biggest cities Tuesday night after the end of peaceful demonstrations demanding better pay for teachers and affordable housing. (AP Photo/Felipe Dana) (AP2013)

Brazilian police guard an area where a police car was set on fire by members of the so-called Black Bloc anarchist group after a march of striking teachers took place to mark National Teachers Day, in Rio de Janeiro, Brazil, Tuesday, Oct. 15, 2013. Police and small groups of protesters clashed in Brazil's two biggest cities Tuesday night after the end of peaceful demonstrations demanding better pay for teachers and affordable housing. (AP Photo/Silvia Izquierdo)

Masked members of the so-called Black Bloc anarchist group protest after a march in support of striking teachers took place to mark National Teachers Day, in Rio de Janeiro, Brazil, Tuesday, Oct. 15, 2013. Police and small groups of protesters clashed in Brazil's two biggest cities Tuesday night after the end of peaceful demonstrations demanding better pay for teachers and affordable housing. (AP Photo/Silvia Izquierdo) (AP2013)

Members of the so-called Black Bloc anarchist group clash with police after a march of striking teachers took place to mark National Teachers Day, in Rio de Janeiro, Brazil, Tuesday, Oct. 15, 2013. Police and small groups of protesters clashed in Brazil's two biggest cities Tuesday night after the end of peaceful demonstrations demanding better pay for teachers and affordable housing. (AP Photo/Felipe Dana) (AP2013)

A demonstrator wears a necklace made from empty tear gas projectiles during a march in support of striking teachers, on the nation's teacher recognition day, in Rio de Janeiro, Brazil, Tuesday, Oct. 15, 2013. Teachers have been on strike demanding better pay for almost two months. (AP Photo/Silvia Izquierdo) (AP2013)

An education worker wears a sticker on his head that reads in Portuguese; "Education Strike," during a march in support of striking teachers, on the nation's teacher recognition day, in Rio de Janeiro, Brazil, Tuesday, Oct. 15, 2013. Teachers have been on strike demanding better pay for more than two months. (AP Photo/Silvia Izquierdo) (AP2013)

A man wearing a Batman costume, holding a heart shaped poster that reads in Portuguese; "Happy Teacher's Day," marches alongside masked members of the so-called Black Bloc anarchist group during a march in support of striking teachers, marking National Teachers Day, in Rio de Janeiro, Brazil, Tuesday, Oct. 15, 2013. Police and small groups of protesters clashed in Brazil's two biggest cities Tuesday night after the end of peaceful demonstrations demanding better pay for teachers and affordable housing. (AP Photo/Felipe Dana)

Protesters shout slogans holding posters with letters that form the message; "Out Cabral', referring to Sergio Cabral, Rio de Janeiro's governor, during a march in support of striking teachers, in Rio de Janeiro, Brazil, Tuesday, Oct. 15, 2013. Teachers have been on strike demanding better pay for over two months. (AP Photo/Felipe Dana) (AP2013)

A man takes a photo of a burning police car, set on fire by members of the so-called Black Bloc anarchist group, after a march of striking teachers took place to mark National Teachers Day, in Rio de Janeiro, Brazil, Tuesday, Oct. 15, 2013. Police and small groups of protesters clashed in Brazil's two biggest cities Tuesday night after the end of peaceful demonstrations demanding better pay for teachers and affordable housing. (AP Photo/Silvia Izquierdo) (AP2013)

A member of the so-called Black Bloc anarchist group points a flaming firework towards police during clashes after a march of striking teachers took place to mark National Teachers Day, in Rio de Janeiro, Brazil, Tuesday, Oct. 15, 2013. Police and small groups of protesters clashed in Brazil's two biggest cities Tuesday night after the end of peaceful demonstrations demanding better pay for teachers and affordable housing. (AP Photo/Felipe Dana) (AP2013)

Masked members of the so-called Black Bloc anarchist group set fire to a police bus after a march of striking teachers marked National Teachers Day, in Rio de Janeiro, Brazil, Tuesday, Oct. 15, 2013. Last week, a largely peaceful rally of teachers turned violent in Rio when small groups of masked protesters started hurling rocks and gasoline bombs and set fire to a passenger bus. Black Bloc anarchists, who earlier joined in the march with teachers, tried to incite the crowd Tuesday but were kept in check by other demonstrators. (AP Photo/Felipe Dana) (AP2013)