CINCINNATI, Rabi'I 25, 1436, Jan 16, 2015, SPA -- A U.S. judge ruled on Friday that an Ohio man charged with plotting to attack the U.S. Capitol with guns and bombs be held without bail after prosecutors said he posed a threat to national security, Reuters reported. Christopher Cornell, 20, of Cincinnati, was arrested last week. He researched the construction of pipe bombs, purchased a semi-automatic rifle and 600 rounds of ammunition and made plans to travel to Washington to carry out the plot, according to an FBI informant's legal testimony. U.S. prosecutors said Cornell should remain behind bars until his trial because of the serious nature of the plot. U.S. Magistrate Judge Stephanie Bowman granted their request to deny bail in a hearing that lasted less than 15 minutes. -- SPA 23:13 LOCAL TIME 20:13 GMT www.spa.gov.sa/w