The US government has quietly barred two Saudi Arabian Airlines pilots from flying in the United States on the grounds that they "pose a security threat," The Wall Street Journal reported on Friday. The report said the case was the first test of a controversial new rule that allows US authorities to take away flying licenses without disclosing any evidence. The cases against Maan Hassan Zarie and Tarek Hassan Jifry stem from the Transportation Security Administration's new responsibility to conduct threat assessments of all pilots, mechanics and flight instructors authorised to work or fly in the United States, the Journal...