, 800 F.2d 131 1307 (4th Cir.I986); Behagen I. Amateur Basketball AssW of U.S.A., 744 F.2d 731, 733 (10th Cir.1984); Jet Charter Service, Inc. I. Koeck, 907 F.2d 1110, 1111 (11th Cir.1990). While this procedure places a burden on the party challenging jurisdiction to at least question the allegati