Al-Qaeda releases a message from slain leader Osama bin Laden praising the revolutions in Egypt and Tunisia and urging Muslims to take advantage of a "rare historic opportunity" to rise up.Duration: 00:57UNKNOWN LOCATION, DATE OF RECORDING UNKNOWN. THE AUDIO TRACK WAS POSTED ON JIHADIST FORUMS ON MAY 18, 2011 AND PICKED UP BY US MONITORING GROUP SITE INTELLIGENCE (AS-SAHAB MEDIA, MONITORED BY SITE - ACCESS ALL/ RESTRICTED TO EDITORIAL USE)
