and laura ingall in shanksville, pennsylvania. laura, let's start with you. >> reporter: crowds have gathered once again. so much very, very proud air going on. i want to show what is going on as we watch this ceremony and that long marble wall that you see behind me that was the ceremony that took place yesterday. the wall of names unveiled, symbolic grouping of white marble slabs engraved with the names of the 40 who died here 10 years ago today. the wall follows the path of united flight 93 and leads to the sacred ground field where the plane crashed inverted into the ground. the 17 ton boulder tha marks impact is accessible only to family members. it will stay that way for years to come. the public is able to get a closer look to pay respect as long a memorial plaza, opened yesterday.