evidence: "When you're a service chief ... you have a moral imperative to make sure you set in place what's going to be needed five, six, seven years in the future," Gen. David Berger, the Marine Corps' 38th commandant, told reporters in one of his last official interviews in office on Wednesday, less than two weeks before he becomes a civilian. [...] When Berger took the reins of the Marine Corps in 2019, the seeds of transformation had already been sown, but it was under his tenure that the hard work of transforming the branch -- dubbed Force Design 2030 -- started to take place. [...] Berger also admits that the culture of the service still needs attention, too. Although he didn't deal with a scandal on the scale of Marines United -- a private social media group of mostly Marines that shared nude images of service members without their consent -- there were still public problems with sexism and misogyny. The Marines also drew headlines for their prominent participation in the riot at the U.S. Capitol on Jan. 6, 2021. Four active-duty Marines, three enlisted and one officer, were arrested for their role in the insurrection.