"New Zealand Prime Minister Jacinda Ardern has vowed to change the country’s gun laws following the deadly Christchurch massacre Friday that left 50 people dead and millions around the globe mourning following the massacre... the deadliest shooting in the country’s modern history... Rebecca Peters, an international arms control advocate and member of the International Action Network on Small Arms... led the campaign to reform Australia’s gun laws after the 1996 Port Arthur (Australia) massacre. After the attack, Australia cracked down on gun violence, outlawing automatic and semiautomatic rifles. More than 640,000 weapons were turned in to authorities in a nationwide buyback."