World News Roundup: 12/28/21

<p>The CDC shortens COVID isolation periods. A deadly shooting spree in Denver. New questions in the police crossfire death of a Los Angeles teen. Correspondent Peter King has the CBS World News Roundup for Tuesday, December 28, 2021:</p><p><br></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>