New Zealand prime minister vows gun law reforms within days of mosque attacks New Zealand Prime Minister Jacinda Ardern vows to reform her country's gun laws in response to the worst mass shooting in the country's modern history. Fifty people were killed when a gunman opened fire Friday at two mosques in Christchurch. The 28-year-old suspect allegedly targeted Muslims because of his white nationalist and anti-immigrant views. Ben Tracy reports from Christchurch.