Repair work is under way at the earthquake-damaged Washington National Cathedral ahead of its reopening for the 10th anniversary of the Sept. 11 attacks. A 500-foot crane is removing debris around the cathedral’s towers. Engineers said scaffolding will be built around the cathedral’s damaged spires as soon as the broken stone is cleared away.

The Aug. 23 earthquake damaged the cathedral’s limestone exterior towers and some interior areas. Safety nets have been installed beneath the ceiling to guard against falling debris, engineers told WRC-TV.