Just six days after a white supremacist gunman killed 50 people and injured dozens more at two mosques in the city of Christchurch, New Zealand Prime Minister Jacinda Ardern announced Thursday that the country will ban all military-style semi-automatic weapons, assault rifles, and high-capacity magazines.\u0022We are announcing action today on behalf of all New Zealanders to strengthen our gun laws and make our country a safer place.\u0022 —Jacinda Ardern, New Zealand Prime Minister\u0022Cabinet agreed to overhaul the law when it met on Monday, 72 hours after the horrific terrorism act in Christchurch. Now... we are announcing a ban on all military-style semi-automatics and assault rifles in New Zealand,\u0022 Ardern said at a press conference. \u0022Every semi-automatic weapon used in the terrorist attack on Friday will be banned in this country.\u0022\u0022On 15 March, our history changed forever. Now, our laws will, too,\u0022 she added. \u0022We are announcing action today on behalf of all New Zealanders to strengthen our gun laws and make our country a safer place.\u0022New Zealand PM Jacinda Ardern moves to ban all military style weapons, effective immediately: \u0022Every semi-automatic weapon used in the [Christchurch] terrorist attack will be banned in this country.\u0022 Via BBC pic.twitter.com/S6xE2vKy0C— Kyle Griffin (@kylegriffin1) March 21, 2019Ardern\u0026#039;s quick and decisive action following the Christchurch attack was praised by progressives in the United States, where even the most modest proposals to change America\u0026#039;s gun laws following\u0026nbsp;frequent mass shootings are met with fervid opposition from the Republican Party and the powerful gun lobby.\u0022This is what real action to stop gun violence looks like,\u0022 tweeted U.S. Sen. Bernie Sanders (I-Vt.), a 2020 presidential candidate. \u0022We must follow New Zealand\u0026#039;s lead, take on the NRA, and ban the sale and distribution of assault weapons in the United States.\u0022Rep. Alexandria Ocasio-Cortez (D-N.Y.) added:Sandy Hook happened 6 years ago and we can’t even get the Senate to hold a vote on universal background checks w/ #HR8.Christchurch happened, and within days New Zealand acted to get weapons of war out of the consumer market.This is what leadership looks likehttps://t.co/TcdR63anBt\u0026mdash; Alexandria Ocasio-Cortez (@AOC) March 21, 2019\r\n\r\nNew Zealand\u0026#039;s new reforms—which are supported by the leader of the country\u0026#039;s opposition National Party—will officially take effect in three weeks, and interim measures are expected to stop a flood of assault rifle purchases in the meantime.\u0022I can assure you that\u0026#039;d be a fairly pointless exercise,\u0022 Ardern said of attempts to buy assault weapons before the new legislation takes effect.As for assault rifles and semi-automatic weapons already in circulation, Ardern announced a gun buyback program that resembles the plan Australia implemented following the Port Arthur massacre in 1996.In addition to taking the lead on bold gun law reforms, Ardern issued a \u0022global call\u0022 to fight white nationalism in the aftermath of last week\u0026#039;s terrorist attack, which appears to have been motivated by Islamophobic ideas and rhetoric.Addressing other world leaders in an interview this week, Ardern said white nationalism must be confronted \u0022where it exists,\u0022 and nations must make sure they \u0022never create an environment where it can flourish.\u0022\u0022If we want to make sure globally that we are a safe and tolerant and inclusive world, we cannot think about this in terms of boundaries,\u0022 she said.