The Navy's top acquisition official acknowledged yesterday that the LPD-17 amphibious ship class has suffered from an obsolete computer network and vulnerabilities in its combat systems, in addition to previously disclosed reliability issues caused by construction problems. Assistant Secretary of the Navy for Research, Development and Acquisition Sean Stackley told lawmakers at a Senate Armed Services seapower subcommittee hearing on May 25 that statements the Defense Department's director of operational test and evaluation submitted to Congress last year lambasting the...