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'Release the hounds': Ransomware attacks prompt calls for aggressive U.S. cyber response

07:36

Dmitri Alperovich, cybersecurity expert and co-founder of Crowdstrike, talks with Rachel Maddow about the options the United States has for responding more aggressively to cyber attacks, both in terms of the attackers and the countries, like Russia, that offer them safe harbor even if they're not directly part of the hacking operations.