A 19-year-old Jordanian citizen accused of trying to blow up a downtown Dallas skyscraper told a federal magistrate this morning at his first court appearance that he understands the charges against him. Hosam Maher Husein Smadi, who was provided a court-appointed attorney, is charged with trying to detonate a weapon of mass destruction. He is expected to enter a plea at a later hearing. Smadi was arrested Thursday after he parked a vehicle laden with government-supplied fake explosives in the underground parking garage of Fountain Place, a 60-story tower at Ross Avenue at Field Street, authorities said. [Hosam Maher Husein...