Two Estonian defensive cyber operators, wearing the insignia of the Estonian Defence Forces' Cyber and Information Operations Centre, test their skills and ability to detect enemy presence, expel it, and identify solutions to harden simulated networks during U.S. Cyber Command's CYBER FLAG 21-1 exercise. U.S. Cyber Command’s CYBER FLAG 21-1 exercise, the largest multinational cyber exercise to date, helped more than 200 cyber operators from 23 countries bolster their defensive skills at Joint Base Suffolk, Virginia, from Nov. 15-20. CYBER FLAG 21-1 is one of the actions that the US took to respond to Solar Winds to strengthen collective defense in cyberspace and affirm the importance of an open, reliable, and secure interoperable, and secure internet.
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