Venezuela's opposition leader Maria Corina Machado speaks during a news conference in Caracas

Venezuela's opposition leader Maria Corina Machado (C) and Jesus Torrealba, secretary of the Venezuelan coalition of opposition parties (MUD) hold their hands, during a news conference in Caracas

Venezuela's opposition leader Maria Corina Machado speaks during a news conference in Caracas

Venezuela's opposition leader Maria Corina Machado (C) pauses as she speaks during a news conference in Caracas