Police vow to crack down on nangs amid boost in usage

Police are seeing more incidents involving drivers who've been huffing nitrous oxide or nangs, that can cause black outs and dizziness. They say the risks are "clear and grave". It is illegal to sell nitrous oxide for huffing, but a Checkpoint investigation's found stores are selling large cannisters of the gas that contain hundreds of hits, with virtually no questions asked. Now police are planning to target retailers. Assistant Commissioner of Road policing, Tusha Penny spoke to Lisa Owen.