A Man Who Threatened To Jump From A Johnson City Bridge Along Interstate 81, Has Been Linked To Two Attempted Robberies In Sullivan County. 32 Year Old Christopher Brown Of Johnson City Is Charged With Aggravated Robbery, Theft Of Property And Being A Convicted Felon In Possession Of A Handgun. The Attempted Holdups Occurred At A Dollar Tree And Subway In Piney Flats. Brown Is Being Held In The Sullivan County Detention Center Awaiting Arraignment.