https://apnews.com/024bf70ee5573af9887758d3d421430b > SAN JOSE, Calif. (AP) — Former U.S. Secretary of Defense James Mattis testified Wednesday in the trial of fallen tech star Elizabeth Holmes, saying the entrepreneur misled him into believing she was on the verge of rolling out a blood-testing breakthrough that he hoped would help save lives of troops in battle. > Mattis' appearance came during the sixth day of a high-profile trial in San Jose, California. The U.S. government alleges that Holmes duped sophisticated investors, patients and customers into believing that her startup, Theranos, had developed a technology hat could scan for an array of potential health problems with just a few drops of blood. Existing tests generally each require a vial of blood.