The Australian Defence Force (ADF) has been called in to assist with the search for 18-year-old Lily Hooper, who is missing in Nattai National Park, southwest of Sydney. Hooper was hiking alone when she was reported missing, prompting a large-scale search effort. Authorities initiated the search and have now requested the support of the ADF to expand coverage and utilize additional resources. The rugged terrain and dense bushland of Nattai National Park are presenting significant challenges to search teams. Police are continuing to appeal for information from anyone who may have seen Hooper in the area. The ADF’s involvement signals the seriousness of the situation and a commitment to locating the missing hiker.