(Right to left) Airman 1st Class Christian Mains, 28th Aircraft Maintenance Squadron able chief, goes over technical orders with Staff Sgt. Chris Dieball, 28th AXMS crew chief instructor, at Ellsworth Air Force Base, S.D., Jan. 21. Knowing how to read and understand a TO is crucial when dealing with the multi-million dollar B-1B Lancer. (U.S. Air Force photo/Senior Airman Anthony Sanchelli)