Oakland hosts Cannabis and Hemp Expo 2011

<div class="meta image-caption"><div class="origin-logo origin-image kgo"><span>KGO</span></div><span class="caption-text">The entrance to the Cannabis and Hemp Expo in Oakland, California. Thousands of marijuana enthusiasts and advocates were in attendance at the third annual pot street fair.</span></div>
September 3, 2011 7:47:57 PM PDT