23:06The NewsroomBrazil's president challenges impeachment voteBBC World Service Duration: 14 minutes Mon 18th Apr 2016, 23:06 on BBC World Service OnlineDilma Rousseff says she's committed no illegal act, Deaths rise in Ecuador quake, Study suggests dinosaurs were heading for earlier extinctionGenresNewsFormatsMagazines & ReviewsBrandThe Newsroom Source: BBC Online