“War is a perpetual struggle with embarrassments.” —Colmar von der Goltz The Assassins’ Gate: America in Iraq by George Packer New York: Farrar, Straus and Giroux; 480 pp., $26.00 George Packer’s The Assassins’ Gate aptly exposes the incompetence of the Bush administration’s occupation of Iraq. The author has traveled to Iraq many times to talk...