Potential threats to US communications are very real: Security expert

Tennessee Senator Marsha Blackburn (R) spoke out against Huawei on Wednesday, saying it is clearly a national security threat. Andy Purdy, chief security officer of Huawei Technologies USA, who previously served as the senior cyber security official at the U.S. Department of Homeland Security, joins CNBC's "Squawk Box" team to discuss Blackburn's comments.
Wed, Aug 7 20198:37 AM EST