ns from other circuits which have discussed this presumption in favor of openness, see. e.g., Publicker Industries, 733 F.2d at 1066-67; Matter of Continental Illinois Securities Litigation, 732 F.2d 1302, 1308-10 (7th Cir.1984); Brown, 710 F.2d at 1177-80, have based that presumption on the importance of preserving "the public's righ