 While under the aegis of the 366 WG, the 34th's B-1Bs were part of one of the Air Force's composite wings, which also included C/D and E model F-15 Eagles, C/D model F-16 Fighting Falcons, and R model KC-135 Stratotankers.Also during 1994, the Air Force selected Ellsworth as the exclusive location from which to conduct a Congressionally mandated operational readiness assessment of the B-1B, known locally as "Dakota Challenge.