If the port and other agencies don???t pay their share, the shipyards warn, the cleanup might not happen on time.???We believe that as the claimed ???stewards of San Diego Bay??? the Port should, rather than challenging the order, demonstrate leadership in this cleanup,??? Sarah Strang, spokeswoman for General Dynamics NASSCO, wrote in an e-mail to the U-T.Castaneda said, however, that the port ??