The Cleverley family spoke to the media briefly Friday morning. They all wore matching blue BYU shirts. Blue, they said, is Camille's favorite color.

"It's times like these that remind us we're all vulnerable," said Camille's father, Joel Cleverley.

"We are touched," said mom Susan Cleverley, choking up. "We are deeply touched by the concern expressed here. The Lord is uniting people and bringing us together."

The family again expressed appreciation for the volunteers and asked for more people willing to spare an hour or two in the weekend search.

Utah's first lady Mary Kaye Huntsman also joined Friday's search.

"I have a 22-year-old daughter — that's why we're here," Mary Kaye Huntsman said, motioning to daughter Mary Anne beside her.

"I tend to go running by myself," said Mary Anne Huntsman. "You never think anything like this would happen."

"Everyone's vulnerable," Mary Kaye Huntsman said. "We could be in the same shoes. This is an eye-opener for all of us."

The city search was coordinated by the Texas-based Laura Recovery Center for Missing Children. Bob Smither co-founded the group after his daughter Laura was abducted and killed 10 years ago. Her remains were found 20 days after she was taken.

"When Laura was missing it meant everything to us to have the community care," Smither said. "It was the only thing that kept us sane."

The organization also aided in the search for Elizabeth Smart, who was taken from her home in 2002 and found alive nine months later. Her accused abductors remain in custody, awaiting trial on numerous charges.

"There's nothing like the outpouring of volunteers to make a difference in giving hope," said Ed Smart, Elizabeth's father, who also came to search Friday. "It helped us see we weren't alone in this. With Elizabeth, awareness is what helped to bring her home."

Most volunteers on Friday's search hadn't known Cleverley but wanted to help.

"If I were lost, I would hope more than just people I knew would come looking for me," said Sandi Summers, a recent BYU graduate who arrived at 8 a.m. Friday to search.

"There are not many opportunities you have to help with a situation like this besides say your prayers," said Larry Smalley of Cedar Hills. "This opportunity is fleeting. Take advantage."

The basement of BYU's Harman Building was transformed into an Emergency Operations Center, with a call center, briefing rooms and a media station.

Teams were instructed to call out Cleverley's name as they searched. They were also told to not move any piece of evidence should they stumble across something interesting. Volunteers also were instructed to not put themselves at risk.