AdvertisementWhat A Trump Defense Secretary Said At The Elizabeth Holmes TrialSeptember 23, 2021The Associated PressfacebookEmailU.S. Secretary of Defense James Mattis speaks during a change of command ceremony at the U.S. Southern Command headquarters on in 2018 in Doral, Fla. Former U.S. Secretary of Defense Mattis testified Wednesday in the trial of fallen tech star Elizabeth Holmes. (AP)