Billionaire media mogul Sumner Redstone dead at age 97

Sumner Redstone was a media mogul who built his family’s drive-in theater chain into a multibillion-dollar empire encompassing CBS and Viacom. In his 90s, he became the center of a jilted lover’s lawsuit that nearly cost his family his financial legacy. CNBC's Andrew Ross Sorkin and Joe Kernen discuss Redstone's legacy.