A grand jury was investigating allegations of interstate transportation of obscenity into Virginia. They subpoenaed documents from three corporations (Ds) all owned by the same individual. All three companies moved to quash the subpoenas and were denied that motion. Ds appealed based on its contentions that the government was required to make a threshold showing. The subpoena for R. Enterprises, INC (D) was overturned by the appeals court in that it required the government to meet the three hurdles established under Nixon: relevancy, admissibility, and specificity. The Supreme Court granted certiorari.