Download AudioA new Alaska Army National Guard commander is taking the helm in the weekend ceremony at Joint Base Elmendorf-Richardson.Col. Joseph Streff will take over from Brig. Gen. Mike Bridges at a ceremony beginning at 2 p.m. Sunday.Officials say Streff has been with the Guard for more than 27 years.Streff is the first new commander under the administration of Alaska Gov. Bill Walker.The Guard is emerging from an investigation of alleged sexual misconduct among its ranks. The issue played a high-profile role in the 2014 gubernatorial race, which was under way during the release of a scathing federal report of sexual misconduct and fraud within the Guard.