 Her scientific credentials were a hoax, and the publication in question was written for her by a team of scientists to obtain a fraudulent doctorate.Because of Hodgkin's political activities, and her husband's association with the Communist Party, she was banned from entering the US in 1953 and subsequently not allowed to visit the country except by CIA waiver.In 1961 Thomas became an advisor to Kwame Nkrumah, President of Ghana, a country he visited for extended periods before Nkrumah's ouster in 1966.