SAN DIEGO -- The Navy's top officer last week defended the service's recent decision to retire its first four Littoral Combat Ships. Speaking at the West 2020 conference here, Chief of Naval Operations Adm. Michael Gilday said the Navy will save approximately $2 billion across the future years defense program by retiring the four vessels instead of upgrading them to maintain the same capability as ships developed later in the program. "We used those first hulls to test and we...