NATIONAL & WORLD NEWS

A short drive north of Fairbanks, Alaska, there's a red shed stuck right up against a hillside. The shed looks unremarkable, except for the door. It looks like a door to a walk-in freezer, with thick insulation and a heavy latch. Whatever is behind that door needs to stay very cold.

"Are you ready to go inside?" asks Dr. Thomas Douglas, a geochemist at the U.S. Army Corps of Engineers.

President Trump is heading to snowy Switzerland to try to sell his "America First" brand of economic nationalism in the mecca of globalization — the World Economic Forum in the Swiss ski resort of Davos. The president will also be meeting with the head of the African Union, two weeks after he reportedly dismissed African nations in crude and vulgar terms.

Updated at 2:17 p.m. ET

Attorney General Jeff Sessions was interviewed last week by special counsel Robert Mueller as part of the investigation into Russian interference in the 2016 election.

Sessions is the first member of President Trump's Cabinet known to have been questioned by the special counsel's office in its investigation into possible coordination between the Trump campaign and Moscow.

Justice Department spokesman Ian Prior confirmed Sessions' interview to NPR on Tuesday. Sessions cooperated voluntarily.

Updated at 11:09 a.m. ET

The nominations for the 90th Academy Awards were announced Tuesday morning by a dapper, genial Andy Serkis and the always-intoxicating Tiffany Haddish.

"Trauma" is a heavy and haunting word. For many Americans, it conjures images of troops returning from Iraq and Afghanistan. The emotional toll from those wars made headlines and forced a healthcare reckoning at the Department of Veterans Affairs.

Dr. Nadine Burke Harris, a pediatrician, would like to see a similar reckoning in every doctor's office, health clinic and classroom in America — for children who have experienced trauma much closer to home.

Updated at 5:06 p.m. ET

The federal government is back open for business on Tuesday, but the immigration fight that brought it to a three-day shutdown is far from over.

Tucked into the new tax law is a provision that offers companies a tax credit if they provide paid family and medical leave for their lower-wage workers.

Many people support a national strategy for paid parental and family leave, especially for workers who are not in management and are less likely to get that benefit on the job. But consultants, scholars and consumer advocates alike say the new tax credit probably won't encourage many companies to take the plunge.

Puerto Rico Gov. Ricardo Rosselló says he is moving to sell off the U.S. territory's public power company, as nearly a third of the island's electric customers remain without power four months after Hurricane Maria struck the island on Sept. 20.

Rosselló said Monday that it might take 18 months to privatize the insolvent Puerto Rico Electric Power Authority, or PREPA, the largest U.S. public utility as measured by the number of customers — 3.3 million.

Pledging to defend American businesses and workers, President Trump imposed tariffs on imported solar panel components and large residential washing machines on Monday.

Updated at 9:05 p.m. ET

President Trump has signed a stopgap spending bill passed by Congress on Monday, ending the partial shutdown of the federal government after three days.

The White House has said normal government operations will resume by Tuesday morning.

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