The World Watches as Historic Notre Dame Cathedral Burns

Heavy clouds of smoke filled the skies above the Notre Dame Cathedral in Paris as a fire broke out in the historic landmark Monday. The spire on top of the 12th-century church collapsed as the fire raged. It was not immediately clear how the cathedral caught fire, but authorities believe it may have been related to ongoing renovations at the church. Tourists were reportedly still in the building as fire started. However, no deaths or injuries have been reported.