December 31, 2021

Airlines and passengers are ending the year with many of their plans upended. And New Year’s weekend may be bumpy, too.

President Vladimir V. Putin of Russia spoke with President Biden for 50 minutes about the escalating crisis with Ukraine, but his intentions remained unclear.

Business leaders are trained to “shoot, move and communicate.” But the pandemic has called on them to rewrite the leadership playbook.

Other high-profile trials around the country have started and ended while Ms. Holmes’s case has stretched for four months into the new year.

Authorities in China have turned to sophisticated investigative software to track and silence obscure critics on overseas social media. Their targets include college students and non-Chinese nationals.