U.S. 1129, 99 S.Ct. 1047, 59 LEd.2d 90 (1979), unless there is a possibility of "continuing, present adverse effects." 0Shea, 414 U.S. at 496, 94 S.Ct 676. (2, 3) There is a heavy burden, how- ever, on the defendant to show that there is no reasonable expectation of repetition. United States v. W.T.