World News Roundup: 04/21

<p>Celebration in Minneapolis after Derek Chauvin's conviction.&nbsp;Black Americans express hope for the future.&nbsp;President Biden calls on senseless killings to end.&nbsp;CBS News Correspondents Steve Futterman in Minneapolis and Steve Kathan have today's World News Roundup.</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>