The media component of the War on Terror continues to give free advertising to Al Qaeda every time the terrorists make a threat. Once they start reporting that these threats are ALWAYS hollow, we will know that we have turned the corner in the War on Terror. Every time Al Qaeda
makes a threat in the media, they have never been able to follow through on
it. Sun Tzu spends a considerable time teaching the we must judge opponents by
their actions and not their words and, even then, we must expect feints. ALL
of Al Qaeda's successful attacks have been launched without warning.
See here for detailed history of Al Qaeda's threats and actions.