Mark Zuckerberg and Bill Gates built billion-dollar technology companies in two very different areas, but they both agree on the biggest threats to American jobs. At his Harvard University commencement speech on Thursday, Facebook FB, +0.11% chief executive Zuckerberg, had some tough words for the Class of 2017. “Our generation will have to deal with tens of millions of jobs replaced by automation like self-driving cars and trucks,” he said, adding, “When our parents graduated, purpose reliably came from your job, your church, your community,. But today, technology and automation are eliminating many jobs. Membership ... (full story)