Dirk Pitt is oceanography's answer to Indiana Jones,' praises the Associated Press. 'Exotic locations, ruthless villains and many narrow escapes-Cussler's fans come for swashbuckling [and] he delivers.' And now Pitt's back to find a crucial piece of marine tech that could reshape the United States' defense program. It is the greatest advance in American defense technology in decades-an attack submarine capable of incredible underwater speeds. There is only one problem: A key element of the proto