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Military personnel in protective gear investigate the scene of the nerve agent attack in Salisbury. Photo: Adrian Dennis / AFP via Getty Images

The United Kingdom has called for an urgent meeting of the United Nations Security Council this afternoon to discuss the use of a Russian-manufactured nerve agent against ex- spy Sergei Skripal and his daughter on British soil, per the BBC. And, during a speech to the House of Commons later this morning, Prime Minister Theresa May is expected to announce a "significant" expulsion of Russian diplomats, according to Sky News.

The big picture: After May declared it "highly likely" that Russia was behind the attack during a speech on Monday, she gave the Kremlin a deadline of midnight last night to provide an appropriate response. Russia — at least publicly — continued to deny its involvement in the attack via a series of incendiary social media posts, prompting today's response from the U.K. Also today, all 29 NATO countries have asked Russia to answer the U.K.'s questions in a joint statement, per AFP's Danny Kemp.

Go deeper

Updated 2 hours ago - World

Mexican President López Obrador tests positive for coronavirus

Mexico's President Andrés Manuel López Obrador during a press conference at National Palace in Mexico City, Mexico, on Wednesday. Photo: Ismael Rosas/Eyepix Group/Barcroft Media via Getty Images

Mexican President Andrés Manuel López Obrador announced Sunday evening that he's tested positive for COVID-19.

Driving the news: López Obrador tweeted that he has mild symptoms and is receiving medical treatment. "As always, I am optimistic," he added. "We will all move forward."

2 hours ago - Politics & Policy

Sarah Huckabee Sanders to run for governor of Arkansas

Sarah Huckabee Sanders at FOX News' studios in New York City in 2019. Photo: Steven Ferdman/Getty Images

Former White House press secretary Sarah Huckabee Sanders will announce Monday that she's running for governor of Arkansas.

The big picture: Sanders was touted as a contender after it was announced she was leaving the Trump administration in June 2019. Then-President Trump tweeted he hoped she would run for governor, adding "she would be fantastic." Sanders is "seen as leader in the polls" in the Republican state, notes the Washington Post's Josh Dawsey, who first reported the news.

Coronavirus has inflamed global inequality

Illustration: Aïda Amer/Axios

History will likely remember the pandemic as the "first time since records began that inequality rose in virtually every country on earth at the same time." That's the verdict from Oxfam's inequality report covering the year 2020 — a terrible year that hit the poorest, hardest across the planet.

Why it matters: The world's poorest were already in a race against time, facing down an existential risk in the form of global climate change. The coronavirus pandemic could set global poverty reduction back as much as a full decade, according to the World Bank.