t that the privilege they assert has an independent basis in the federal common law presumption of grand jury secrecy. That presumption, which is codifi4'.4 in O 2006 Thomson/West. No Claim to trig. U.S. Govt. Works. EFTA01699664 • . . vvnv nav rid tgl 010 832 F.2d 554 (Cite as: 832 F.2d 554, *560