Never Ending War

This from Wired yesterday:

Asked at a Senate hearing today how long the war on terrorism will last, Michael Sheehan, the assistant secretary of defense for special operations and low-intensity conflict, answered, “At least 10 to 20 years.”  

It was just two months ago that the top U.S. intelligence official testified that al-Qaida had been battered by the U.S. into a state of disarray. A year ago, the current CIA director, John Brennan, said that “For the first time since this fight began, we can look ahead and envision a world in which the al Qaeda core is simply no longer relevant.” Just this week, the commander of the Joint Special Operations Command, Army Lt. Gen. Joseph Votel, told a Florida conference that he was looking at missions beyond the counterterrorism manhunt.

Yet a spokeswoman, Army Col. Anne Edgecomb, clarified that Sheehan meant the conflict is likely to last 10 to 20 more years from today — atop the 12 years that the conflict has already lasted. Welcome to America’s Thirty Years War.

Since only 25% of America's 17-24 year olds are eligible for military service, a trend that has been going on for years now, if you keep your children fit and healthy they will be members of a select pool who will have the opportunity to become heroes.

What could be one of the reasons the war against terrorism could last so long?