Remembering Exercise Coronet Bat, 25 Years Later June 3, 2020 | By Jennifer-Leigh Oprihory Twenty-five years ago this week, a pair of B-1B Lancers took off from Dyess Air Force Base, Texas, and circumnavigated the globe without stopping. The 36-hour and 13-minute flight covered 20,100 miles, including six aerial refuelings.