Is it necessary for a witness called before a grand jury to be able to cross-examine other witnesses?

"It would be profitable at this point to discuss the oldest and, perhaps, the best known of all investigative bodies, the grand jury. It has never been considered necessary to grant a witness summoned before the grand jury the right to refuse to testify merely because he did not have access to the identity and testimony of prior witnesses. Nor has it ever been considered essential that a person being investigated by the grand jury be permitted to come before that body and cross-examine witnesses who may have accused him of wrongdoing. Undoubtedly, the procedural rights claimed by the respondents have not been extended to grand jury hearings because of the disruptive influence their injection would have on the proceedings, and also because the grand jury merely investigates and reports. It does not try."

Hannah v. Larche, supra, 363 U.S. at 448-449, 80 S.Ct. at 1518.