KINGSPORT — At about 6 a.m. Saturday, MeadowView Marriott Conference Resort and Convention Center received a bomb threat over a fax machine, according to a press release from the Kingsport Police Department. The fax claimed that explosives had been installed in the building, and the threat evolved into an extortion attempt, with the perpetrator demanding several thousand dollars in exchange for not detonating the explosives, according to the release, issued by KPD Public Information Officer Thomas M.