 However, the authors do not quote or reproduce the documents in question and at least one scholar argues that their testimony should be suspended until the primary sources become available.Coe was Blacklisted, the US denied his passport (in late 1949) and prevented Coe from traveling to neighboring countries (June 1953) due to his ties to Soviet espionage.Coe sought work abroad, eventually finding a sponsor in the People's Republic of China, where he joined a circle of expatriates working with the government.