Authorities are conducting a massive search in Alaska for multiple cruise ship passengers who have gone missing after leaving their ships for solo hikes. One case involves a 62-year-old American doctor from Kentucky who failed to return after hiking near Mount Roberts in Juneau. Urgent efforts are in place to locate the missing individuals as local agencies collaborate to ensure their safety. Hikers and local authorities are sharing safety tips while the search continues, raising awareness about the risks associated with solo hiking in remote areas.