zaveon dobson's mother will bury him the day after christmas. >> the "cbs overnight news" will be rightapple is the biggest and richest company in the world. and it finds itself at the heart of some of the biggest issues facing american companies today. there's a battle over the encryption used in apple products. the debate over companies hiding profits overseas and the challenges of doing business in china. apple is also notoriously secretive. but charlie rose was invited into apple headquarters for "60 minutes." >> go. >> thank you. thank you. it's been an incredible year for apple. >> reporter: tim cook has been running apple for the past four years. but for most of the 15 years before that -- >> we had some real revolutionary products. >> reporter: the stage belonged to apple's late co-founder steve jobs. >> we're going to make history together today. >> reporter: jobs transformed the computer from a cumbersome machine into perhaps the most personal and sleek consumer product of all-time. the iphone is 12,000 times more powerful than the original mcintosh and next year it will have

. >> zaveon dobson, a 15-year-old fulton high school student and football player, was struck and killed after he jumped on top of three girls to shield them. >> reporter: at one point, the chief struggling to keep going. >> sorry. to shield them from the shooter. >> reporter: those others were not hit by the gunfire. tonight, the fulton high football team putting out this photo honoring their fallen teammate. >> this was a fine, fine young man, who is a success story. >> reporter: one of the alleged gunmen was shot and later died. one young man, killed trying to protect three friends. >> ron, thank you. >>> overseas, escaping isis. millions trying to flee the terror group. an american husband and wife, on a mission to save nearly 150 refugees in iraq. elizabeth vargas was there in iraq. >> reporter: 149 christians running from isis in iraq, leaving the refugee camp they've called home for more than a year. they're christian refugees living peacefully until their homes were seized. tens of thousands fled in chaos in one night. and now, it's finally time for them to start a new life in eu