New Zealand Prime Minister Jacinda Ardern reacts during a briefing in Wellington, capital of New Zealand, on March 16, 2019. Jacinda Ardern reiterated to the public Saturday morning that the country's gun law will be changed. Gunmen opened fire in two separate mosques in Christchurch of New Zealand on Friday, killing 49 people and wounding 48 others. (Xinhua/Guo Lei)