Detour Doolittle Drive Published May 17, 2007 By Kimberly Moore Limrick 28th Bomb Wing Public Affairs ELLSWORTH AIR FORCE BASE, S.D. -- As a precautionary measure, a portion of Doolittle Drive has been blocked off indefinitely. The smoke stack outside Building 5902 was observed to be cracking on May 8. The inoperable, 95-foot structure was built in 1942. Emergency funding for its demolition has been sought. Daily observations of the structure are underway. For more information call Public Affairs at 385-5056.