Massive tornado kills dozens

<div class="meta "><span class="caption-text ">** CORRECTS DATE TO May 23 ** An emergency worker searches a Walmart store that was severely damaged by a tornado in Joplin, Mo., Monday, May 23, 2011. A large tornado moved through much of the city Sunday, damaging a hospital and hundreds of homes and businesses. &#40;AP Photo&#47;Charlie Riedel&#41; (AP Photo&#47; Charlie Riedel)</span></div>
May 23, 2011 10:36:37 AM PDT