Col. James Katrenak, 28th Maintenance Group commander, guides Air Force spouses on a private tour of a B-1B Lancer during the Heart Link program at Ellsworth Air Force Base, S.D., April 18, 2011. The spouses learned about the aircraft’s capabilities, and had the opportunity to view the cockpit. (U.S. Air Force photo by Airman 1st Class Alessandra N. Gamboa)