Bay Area May Day protests

<div class="meta image-caption"><div class="origin-logo origin-image kgo"><span>KGO</span></div><span class="caption-text">Oakland police officers and protesters clash during a May Day march in downtown Oakland. One officer got hit with a liquid believed to be yellow paint. &#40;May 1, 2012&#47;KGO&#41;</span></div>
May 2, 2012 2:19:23 AM PDT