As September 11 and Somalia proved, hostile forces are now engaging America differently, avoiding open combat with our enormous military, striking at our civic centers or dragging us into theirs. But urban warfare isn't new; it is as old as the battle of Jericho. Now an incomparable collection written by esteemed military veterans--some currently serving, others civilian analysts--re-creates the last century's most astonishing examples of this kind of fighting . . . and offers important lessons for...