The National Cathedral is expected to reopen this weekend in time for events commemorating the 10th anniversary of the Sept. 11 terrorist attacks.
The national landmark has been closed for repairs since last week's Mineral, Va., earthquake shook the East Coast. The quake caused one of the cathedral's four spires to break off.
Inside, workers found pieces of mortar that fell from columns and the cathedral's 98 foot ceiling.
A tight, heavy duty net has been put up to catch any other pieces that may fall.
"We have been up on those balconies with binoculars and spotlights, the crew and me, those of us that really know this building, and the engineers," said head stonemason Joe Alonso. "If anything is out of the ordinary, we would know. We would see something that wasn't quite right."
The cathedral has been closed since the earthquake, but will reopen next weekend for events to commemorate the tenth anniversary of 9/11.
Meanwhile, another aftershock rattled people in central Virginia Thursday morning.
The U.S. Geological Survey reported the tremor at a 3.4 magnitude in Mineral.
The Aug. 23 earthquake was a 5.8 magnitude. More than 20 aftershocks have followed the quake.