f attack that the government wishes to pursue, the district court should consider it in the first instance. Reversed. C.A.1 (Mass.),2003. In re Keeper of Records (Grand Jury Sub- poena Addressed to XYZ Corp.) 348 F.3d 16, 62 Fed. R. Evid. Serv. 1032 END OF DOCUMENT O 2011 Thomson Reuters. No Claim to Orig.