It's taken years to build and now finally it's ready for the Brisbane Metro. Today the public was given the chance to explore the new Adelaide Street Tunnel. Download the 7NEWS app: 7news.link/7newsapp | 7NEWS Brisbane

“We have prepared the family for the fact that we might not be able to find Gus alive.” A search crew looking for a missing little boy near Yunta in South Australia’s outback has discovered a single footprint 500m north of the homestead that matches the size of a small boot. Police admit that time is running out to find four-year-old Gus safe and well – he has been without food, water and shelter for 90 hours. tinyurl.com/5fry7xek #Yunta #7NEWS | 7NEWS Adelaide