Authorities Criticised Over London Tower Blaze

Tough questions asked of UK government regarding building regulations after a killed at least 30 people in a tower block in west London.

Also in the programme: quantum communications and the lost city of the Harla people

(Picture: Emergency services personnel on top of Grenfell Tower in west London after a fire engulfed the 24-storey building on Wednesday morning. Credit: Rick Findler/PA Wire)