MADISON, Wis. (AP) — Gov. Scott Walker’s administration plans to post armed security guards at the entrances to the state Department of Justice’s Madison headquarters. The guards will go on duty beginning Sept. 1. A guard has been stationed at a desk at the main lobby entrance but doesn’t carry a weapon. State Department of Administration spokesman Cullen Werwie says the move is part of what he called a “security upgrade” for the facility and isn’t part of a response to any specific threat. Werwie declined further comment. The building also houses the Assembly chief clerk’s office, the Legislative Technology Services Bureau and the state law library.