(Left to right) Airman 1st Class Christian Mains and Airman Mark Vadnais, 28th Aircraft Maintenance Squadron able chiefs, learn safer maintenance techniques from Staff Sgt. Chris Dieball, 28th AMXS crew chief instructor, at Ellsworth Air Force Base, S.D., Jan. 21. B-1B Lancer able chief Airmen must attend 22 academic days, consisting of 108 hours of training before becoming a true crew chief. (U.S. Air Force photo/Senior Airman Anthony Sanchelli)