The Salvation Army reports one of its employees and a bell-ringer were threatened at knife point Tuesday by another bell-ringer who had just been fired.  The incident happened at a Red Kettle donation site in Brown Deer.  Army officials say the same fired worker made additional threats in a call to the Salvation Army of Milwaukee County’s Citadel Corps.  Shortly after the original incident outside a Walgreens store, 40 other Red Kettle locations were closed as a precaution.  No injuries or arrests have been reported.