MILWAUKEE, WI -- As the Navy commissioned its first Littoral Combat Ship here Saturday, Chief of Naval Operations Adm. Gary Roughead said the 55-ship fleet of new, first-of-their-kind vessels is only a "floor" -- the minimum number the service needs in the future. Meanwhile, Navy Secretary Donald Winter said changes to ship LCS requirements are unlikely in the near future. Roughead spoke to reporters after the hour-long commissioning ceremony, saying he is impressed with the LCS. The service has two...