Social media execs grilled in Congress over child safety concerns; U.S. plans 'campaign' of retaliatory strikes after killing of 3 soldiers, officials say; FBI Director Christopher Wray warns of alarming hacking threat from China; and more on tonight’s broadcast. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.