“Airmen’s Week,” officially ended as the last group of BMT graduates completed the  one week, post-BMT course; the following week, the length of BMT increased to 8.5  weeks as the lessons within Airmen’s Week were absorbed into the BMT curriculum.  The revamped BMT training model focused on improvements through four lines of  effort: Readiness, Redesigned Airmanship 100 Design & Delivery, Fitness and Warrior  Ethos / Air Force Heritage.