'Hedgehogs' v tanks - Kyiv braces for onslaught

As Russian troops closed in on Ukraine's capital Kyiv on Thursday, a muddy construction site in a local neighborhood was teeming with workers and welders of the KAN real estate developer. Instead of homes and offices, they were making giant, metal anti-tank barricades known as "hedgehogs", and smaller spiked barriers aimed at stopping wheeled vehicles. Olivia Chan reports.