AdvertisementUnited States Warns Americans Not To Travel To Venezuela As Tensions RiseJanuary 29, 2019Sasha IngberfacebookEmailVenezuela's top prosecutor, Tarek William Saab, talks to reporters in Caracas on Tuesday. He announced that Juan Guaidó, now President Nicolás Maduro's most prominent opponent, is barred from leaving the country because of an investigation. (Getty Images)