20 years on: Was demoting Pluto a mistake?

In 2006, Pluto was stripped of his planetary status, with the demotion resulting in our solar system dropping from nine planets to just eight. However, Pluto's defenders have held their own over the past two decades. So, the real question is: was demoting Pluto for being too small really a big mistake? Leo Enright, Space Commentator, joins Ciara to settle the debate...