A Trump administration official tells Axios that the cyberattack on the U.S. government and corporate America, apparently by Russia, is looking worse by the day — and secrets may still be being stolen in ways not yet discovered.

The big picture: "We still don't know the bottom of the well," the official said. Stunningly, the breach goes back to at least March, and continued all through the election. The U.S. government didn't sound the alarm until this Sunday. Damage assessment could take months.

1. Vaccine: FDA advisory panel endorses Moderna vaccine for emergency use — The brewing workplace debate over vaccinations — America's rural, underserved communities close in on coronavirus vaccine.
2. Health: CDC: Drug overdose deaths accelerated during pandemic — Study finds nearly 12,000 excess deaths among young adults between March and July — Coronavirus cases hold steady but remain dangerously high.
3. Politics: Inauguration to be limited to State of the Union-sized audience — Incoming White House senior adviser Cedric Richmond tests positive — Biden set to take vaccine in public next week.
4. States: Governors say federal government cutting vaccine allocations — Supreme Court denies religious school challenge to Kentucky's restrictions.
5. Cities: San Francisco to mandate 10-day quarantine for travelers from outside Bay Area — NYC restaurants fight to stay alive amid COVID-19 restrictions.
6. World: U.K. says it vaccinated more than 130,000 people in first week of program.

Sen. Mitt Romney (R-Utah) called on the White House to “aggressively” condemn a suspected Russian cyberattack in an interview with SiriusXM on Thursday evening.

Why it matters: Since news broke that hackers tied to Russia penetrated U.S. government networks and companies, public officials including President-elect Biden have come forward with rebukes. President Trump has been largely silent, though the White House has held emergency meetings with officials across agencies to address the breach, per Bloomberg.

Yemen topped the International Rescue Committee's annual watchlist of the world's most dire humanitarian crises for the third consecutive year, followed by Afghanistan and Syria.

The big picture: All three face chronic violence and instability, and Yemen is one of four countries at risk of famine in the coming year (the others are Burkina Faso, South Sudan and northeastern Nigeria).

President Trump’s imposition of long-awaited sanctions on Turkey this week over its purchase of a Russian S-400 missile defense system illustrates the fragile state of a critical relationship — but it may also allow President-elect Joe Biden to start fresh with Turkish President Recep Tayyip Erdoğan.

Why it matters: Erdoğan raged against the sanctions, which target Turkey’s defense procurement agency and the agency’s leaders, as a “hostile attack” from a NATO ally. Trump had resisted pressure to impose them, but Congress forced his hand.

More than 300 Nigerian schoolboys captured by Boko Haram nearly a week ago were handed over to government security agencies on Thursday, the Wall Street Journal reports, citing the Katsina state governor.

Why it matters: Their release puts to rests fears that the boys would become long-term hostages of the Jihadist group and prompted outpourings of relief across Nigeria.

The Court of Arbitration for Sport on Thursday cut Russia's ban from participation in global sports from four years to two years, but ruled that Russia will not be able to enter teams or even use its name or flag at the next two Olympics, AP reports.

Why it matters: Russia has been accused by anti-doping regulators of running of one of the most sophisticated doping schemes in the history of international sports, which at its peak was alleged to involve state authorities tampering with testing samples.

Russian President Vladimir Putin on Thursday denied that Russian intelligence officers were involved in the near-deadly Novichok poisoning of opposition leader Alexei Navalny, suggesting with a laugh that they "would have probably finished the job," the New York Times reports.

Why it matters: A bombshell investigation led by open-source research group Bellingcat found that agents of Russia's Federal Security Service (FSB) with expertise in chemical weapons followed Navalny on more than 30 trips to and from Moscow starting in 2017 before he was poisoned in August.

Gen. Mark Milley, chairman of the Joint Chiefs of Staff, met with Taliban negotiators in Qatar on Tuesday and flew to Afghanistan on Wednesday to meet with Afghan President Ashraf Ghani to urge a reduction in violence, AP reports.

Why it matters: It's the second time that Milley, the U.S. military's top general, has met face-to-face with negotiators from the militant group that ruled Afghanistan in the early stages of America's longest war. Milley previously met with Taliban negotiators in Qatar in June, a meeting that was not reported until today.

French President Emmanuel Macron has tested positive for the coronavirus, the Élysée Palace announced Thursday.

Why it matters: The 42-year-old president is the latest Western leader known to have contracted COVID-19.

House Armed Services Committee Chairman Adam Smith has outlined a plan for his body to improve its oversight of cybersecurity, although experts say suspected Russian cyberattacks show the focus is late in coming.

Why it matters: The alleged Russian penetration of the Pentagon and Treasury Commerce, State, Homeland Security and other departments shows the sweep of digital warfare and the need for an all-hands, all-of-government response.