with any luck, we'll never run out of enemies

News item: Ever since Army Gen. David H. Petraeus was appointed to oversee the U.S. military in Iraq more than a year ago, the primary enemy for his troops has been shifting. ... This week, things changed again. In two days of Capitol Hill testimony, Petraeus declared Iranian-backed "special groups" -- hardened fighters who are part of larger Shiite militias -- to be the "greatest long-term threat to the viability of a democratic Iraq."