embankment in brazil in a rural area. another 12 people are injured. some are children. the bus plunged 1,000 feet. passengers were letting to a religious event. it appears the bus lost control in a bend and crashed. in a few hours, opponents of brazil's president are expected to protest for impeachment. they will not tolerate violence. dozens of politicians are under investigation for corruption as a state-run oil company. >> reporter: it wasn't that long ago. a booming brazil surpassed the u.k. as the world's sixth largest economy. foreign investors flocked to the south american giant, its large offshore oil reserves and global sporting events.