The Air Force has revamped previous leaders’ plans to overhaul the service , dropping several key aspects while keeping others. Air Force Sec. Troy Meink and Chief of Staff Gen. Ken Wilsbach announced the changes to the “reoptimization plan” their predecessors released last year in a new memo, the service said Tuesday. Some elements of the reoptimization plan — including large-scale exercises to prepare the service for a major war, the establishment of warrant officers and unit readiness