No. Grand Jury proceedings are secret and only specifically-authorized persons can be present.  In addition to the Assistant District Attorney and the Grand Jurors, there is a court reporter and a Grand Jury Warden, who oversees administrative aspects of the proceedings.  The ADA is the legal adviser of the Grand Jury and examines all witnesses who testify before it, including any defendant or defense witnesses.  At least 16 Grand Jurors must be present for any Grand Jury to hear evidence and take action.  Furthermore, at least 12 of the members who have heard the evidence must agree before any affirmative action can be taken.