Biogen said on Tuesday its Chief Executive Michel Vounatsos will step down, with the drugmaker adding it would scale down its sales infrastructure for the controversial Alzheimer's drug Aduhelm.

Russian forces seized Europe's biggest nuclear power plant in southeastern Ukraine in heavy fighting but a huge blaze on the site was put out. Russian forces also bombarded Ukraine's capital Kyiv and surrounded several other cities.

Volodymyr Zelenskiy swept to power three years ago promising to end a war with Moscow-backed separatists in eastern Ukraine. He now faces a Russian invasion that could result in the overthrow of his government and the end of Ukrainian democracy.

KYIV (Reuters) -The Russian and Ukrainian governments on Friday signalled an openness to negotiations even as authorities in Kyiv urged citizens to help defend the capital from advancing Russian forces in the worst European security crisis in decades.

WASHINGTON (Reuters) -President Joe Biden's selection on Friday of Ketanji Brown Jackson as the first Black woman U.S. Supreme Court nominee immediately thrusts the federal appeals court judge into the center of America's debate over race.

The Dow on Friday registered its biggest daily percentage gain since November 2020 with the market rebounding for a second day from the sharp selloff leading up to Russia's invasion of Ukraine.

Stocks around the world rebounded on Friday, the U.S. dollar fell and oil prices dipped as investors welcomed talk of renewed diplomacy after Russia's invasion of Ukraine, and as coordinated Western sanctions left Russia's energy sector largely untouched.

MEDYKA, Poland/SIGHETU MARMATIEI, Romania (Reuters) -Tens of thousands of Ukrainians, mostly women and children, crossed into Poland, Romania, Hungary and Slovakia on Friday as Russian missiles pounded the capital Kyiv and men of fighting age were told to remain.

The three largest U.S. drug distributors and drugmaker Johnson & Johnson have agreed to finalize a proposed $26 billion settlement resolving claims by states and local governments that they helped fuel the U.S. opioid epidemic.

(Reuters) -The fallout to the global aviation industry from Russia's invasion of Ukraine spread on Friday as two more European countries banned Russian carriers and the European Union said it would restrict exports of aircraft parts.