This week on the Wire, Christina and Jack did some deep dives on some hot-button topics.

In the wake of a string of mass shootings over the weekend, Christina looked into gun culture and gun control laws in the United States.

Jack looked into graffiti in Tamaki Makaurau. He spoke with graffiti artist CAPO, street art expert Dr Reuben Woods, and city councillor Shane Henderson.

Christina also had her regular catch up with Allan Blackman on Dear Science. This week, they discussed the imperial and metric systems, a super-reactive chemical that could change how we analyse the climate, and silk tags used to detect if medication is dodgy or not.

And finally, James Hita, a seabed mining campaigner from Greenpeace, called into the show to chat with Christina about a Greenpeace petition being delivered to Parliament on Wednesday.

Whakarongo mai!