Editor’s Note: For the past year, WTOP National Security Correspondent J.J. Green has investigated a growing national security crisis fueled by a combination of escalating foreign intrusions and internal missteps. In his series, “National InSecurity ,” he examines how America’s digital defenses have become increasingly fragile.

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While U.S. leaders struggle to contain domestic vulnerabilities, America’s adversaries are preparing for the next phase of digital warfare. The new battlefield is already here — inside networks, satellites and personal devices — and it is e

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