Whether a federal sentencing enhancement under U.S.S.G. § 3B1.1(a) is permissible when leadership participants are charged in a separate indictment

. WHEN FEDERAL DEFENDANTS ARE ATTRIBUTEDA DRUG QUANTITY FAILS TO TESTIFY CONDUCTED AND THERES NO REQUIRE reversalbased on extrapolation and the chemist AS TO -HOW THE EXTRAPOLATION WAS evidence in the record does this WHEN DEFENDANTS RECEIVE AN LEADERSHIP ENHANCEMENT WHICH INVOLVED 5 OR MORE PARTICIPANTS BUT NOT CHARGED IN THE INSTANT INDICTMENT BUT ARE INDICTMENT IS THE ENHANCEMENT PERMISSIBLEUNDER 3B1.1(A) THE 5 PARTICIPANTS ARE CHARGED IN A SEPARATj I** ■ : §§.'■X m • v'V ■ '