World News Roundup: 05/04

<p>At least 23 people killed in Mexico City train disaster.&nbsp;Tornadoes in the South.&nbsp;The FDA close to approving the Pfizer vaccine for 12-15 year-olds.&nbsp;CBS News Correspondent Steve Kathan has 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>