World News Roundup: 12/23

<p>Signs of hope in the fight against the omicron variant. The Supreme Court will weigh in on vaccine mandates. A Pennsylvania congresswoman -- carjacked. Correspondent Peter King has the CBS World News Roundup for Thursday, December 23, 2021:</p><p>See Privacy Policy at <a href="https://art19.com/privacy" rel="noopener noreferrer" target="_blank">https://art19.com/privacy</a> and California Privacy Notice at <a href="https://art19.com/privacy#do-not-sell-my-info" rel="noopener noreferrer" target="_blank">https://art19.com/privacy#do-not-sell-my-info</a>.</p>