A Russian missile attack on a large Ukrainian military facility near the border with NATO member Poland killed 35 people, wounded 134, and marked a "significant escalation" of the conflict. President Joe Biden has said NATO will defend every inch of its territory if Russia's invasion spills over into member states, and Sunday's strike came within 12 miles of doing so. The attack was likely a message from Russia to NATO nations using the base to train and supply Ukrainian soldiers.

SEE HOW THE US IS TRYING TO DEESCALATE THE CONFLICT

China placed all 17 million residents in one of its biggest cities under lockdown Sunday as virus cases doubled nationwide to nearly 3,400 and anxiety mounted over the resilience of its 'zero-Covid' approach in the face of the worst outbreak in two years. The city of Shenzhen told all residents to stay at home, suspended public transportation until March 20, and launched three rounds of mass testing to fight the virus.

FIND OUT HOW CHINA'S 'ZERO-COVID' POLICY HAS WORKED

Former President Barack Obama announced that he tested positive for COVID-19. Obama posted on Twitter that he had "a scratchy throat for a couple days but am feeling fine otherwise” after spending time in Hawaii. He said wife, former first lady Michelle Obama, tested negative.

FIND OUT WHY OBAMA IS 'GRATEFUL' AFTER CATCHING COVID

In honor of National Pi Day (3/14, get it?), who holds the world record for reciting the most digits of the mathematical formula, and how many?

Friday's answer: Karl "Tuffy" Rhodes homered in his first three at-bats on Opening Day 1994, becoming the only MLB player to do so. He hit only 10 more in six MLB seasons before becoming a star in Japan.