Notre Dame Cathedral in Paris held its first mass on Saturday since a massive fire broke out at the centuries-old place of worship in April.<br />For security reasons, only about 30 people, including priests and church employees participated in the service,... which was held inside a side-chapel left undamaged by the blaze.<br />Worshippers wore hard-hat helmets...and burnt wood debris was still visible.<br />Although it's still unknown about when the cathedral will open to the public, Father Pierre Vivares told the Associated Press that it will take a lot of time and work to rebuild the cathedral.<br />
