ction of witn es and judi- cial process); United States I Gilbert, 425 F.2d 490 (D.C.Cir.1969) (per curi (protection of witnesses); United States Bentvena, 288 F.2d 442 (2d Cir.196 (integrity of judicial proceedings); cf United States Anguilo, supra, at 972. But there is no authority extending that