The mother of the first whistle-blower arrested in the Trump era says her daughter is being held under an unjust media blackout to stop the American public learning who she really is. Billie Winner-Davis' daughter Reality Winner, a US Air Force veteran, was sentenced to prison for more than five years in August 2018 as part of a deal in which she pleaded guilty to leaking a classified NSA document providing details of a 2016 Russian cyberattack on a supplier of US voting software. Winner, 27, who worked in the US Air Force's drone program, is serving the longest sentence ever given to a journalistic source by a federal court, according to the Department of Justice. CNN has repeatedly sought permission to interview Winner in federal prison, and recently accompanied Winner-Davis on the seven-hour road trip from her home to visit her daughter at FMC Carswell in Fort Worth, where she is incarcerated, but our team was not permitted to go inside. FMC Carswell's warden has denied CNN's requests. Our attempts to speak with the warden over the phone ... were unsuccessful. CNN also sought to interview Winner by telephone but was told by her mother that the former drone operator has been told by prison staff not to add media outlets to her phone list. "She has been warned and she has been frightened as far as the restrictions on her communications," Winner-Davis said. "They're telling her she cannot even have any contact with any kind of journalists or media, in any way, shape, or form."