CHICAGO (AP) – A Wisconsin veteran hasn’t let the federal shutdown shut her down.  Staff Sgt. Catherine Threat returned from active duty in Afghanistan in July. Since then, she’s been in the Army Reserve and working as a civilian at Fort McCoy in central Wisconsin – until last week when she was furloughed.  Rather than sitting around, Threat decided to volunteer for a veteran patrol for the Chicago Public Schools “safe passage” program.  Part of the effort to keep students safe while traveling to school, the veteran branch of the program is coordinated by the group No Veteran Left Behind.  Threat returns to work at Fort McCoy Tuesday.  But she says she hopes that in some small way, her presence on the Chicago streets helped a few students, even for a short time.