Ten people were shot and killed in a supermarket in Boulder, Colorado yesterday.

It was the second mass shooting in the United States in less than a week. Last Tuesday eight people were killed at three spas in Atlanta, six of whom were women of Asian descent.

According to the Gun Violence Archive, last year there were more than 600 shootings in the US in which four or more people were shot by one person.

Cal Thomas and Marion McKeone discussed this in our weekly US slot, and whether the country's gun laws are ever likely to change.