World News Roundup - 04/01

<p>March ends with another mass shooting -- four dead including a child at a Southern California office building. Jurors view police body cam footage at the Derek Chauvin murder trial. New information from Pfizer on the longevity of its COVID-19 vaccine. Correspondent Steve Kathan has the CBS World News Roundup for Thursday, April 1, 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>