Workers are spending a hot summer on scaffolding that wraps around Iowa’s 131-year-old Capitol. It’s the most visible part of a $10 million, yearlong project to restore the building’s massive dome. The priority is replacing 15,000 bricks, but because that task required construction of scaffolding that climbs from the main structure, officials decided it was the perfect time for other repairs. Crews also will install a permanent platform in the dome so workers can monitor future deterioration.