A Kingsport Businessman Accused Of Bombing A Johnson City Medical Center Has Been Arraigned In U.S. District Court In Greeneville. Christopher Alexander, Who Owns Alexander Prosthetics Specialists, S Alleged To Have Set Off A Pipe Bomb On Sunday At Victory Orthotic And Prosthetics On Knob Creek Road. He’s Charged With Damage Of A Building Used In Interstate Commerce And Knowingly Possessing A Firearm, The Pipe Bomb, Not Registered To Him. Alexander Plead Not Guilty To The Charges. He Remains In The Custody Of The U.S. Marshal’s Service. A Trial Date Is Set For September 29th.