A museum plans to catalog every item from the Las Vegas shooting memorial. Viewers have until Dec. 17 to see crosses and mementos before they become part of the Clark County Museum’s permanent collection. Cataloging the thousands of items could take more than a year. Each item gets a detailed description and is photographed from several angles. Items will be packaged and preserved in materials designed for long-term storage. Photos and descriptions will eventually be posted online for the public. Anyone interested in volunteering should email Cyndi Sanford at cynthia.sanford@ClarkCountyNV.gov