From Columbine to Parkland: How have school shootings changed us?

Jay Z, known legally as Shawn Carter, has sold drugs, spit rhymes, steered Def Jam Records, and started restaurants, clothing lines, sports agencies, and streaming music services. Now he’s going after the big bucks. The rapper/entrepreneur is launching his own venture capital firm, aimed at funding seed-stage companies. It’s not Jay Z’s first foray into…