Chernobyl disaster site enclosed to prevent radiation leaks

The Reactor No 4 at Chernobyl, site of the worst nuclear accident ever, has been enclosed by a steel shelter designed to prevent radiation leaks from the site. The shelter costing over €1.5 billion (around ₹10,900 crore) is reportedly the largest land-based movable object constructed. The shelter will be made airtight by 2017, and will reportedly last 100 years.