LAS VEGAS -- Cybersecurity and Infrastructure Security Agency Director Jen Easterly emphasized the need for Americans to “internalize lessons on resilience” from Ukraine's battle against Russia in preparation for cybersecurity challenges the United States is likely to face in the next few years, during an evening keynote appearance at the Black Hat conference here. One year after the U.S. and Ukraine signed a memorandum of understanding on cybersecurity, Easterly and her counterpart Viktor Zhora discussed extensive collaboration between the two...