Images from U.S. Olympic marathon trials in Houston

<div class="meta image-caption"><div class="origin-logo origin-image "><span></span></div><span class="caption-text">Charlie Serrano competes in the U.S. Olympic men&#39;s marathon trials Saturday, Jan. 14, 2012, in Houston. &#40;AP Photo&#47;Pat Sullivan&#41; (AP Photo&#47; Pat Sullivan)</span></div>
January 14, 2012 2:39:50 PM PST