A new round of confrontation between demonstrators in Des Moines and law enforcement may erupt Friday night when a temporary permit allowing for 24-hour occupation of grounds on the west side of the Iowa Capitol expires. Participants and supporters of the Occupy Des Moines movement — a loosely-knit group that generally objects to perceived ongoing political and economic inequalities — are currently meeting to discuss a possible path ahead if their permit, state officials say was only issued for a three-day time period, expires at 11 p.m