SOUTH AFRICA   –  A week before her death, South African model Reeva Steenkamp talked about her secure, blissful environment. “I woke up in a happy, safe home this morning,” she tweeted. “Not everyone did.” Four days after she posted that message, neither did she. The 29-year-old model was shot dead by her boyfriend at his house in Pretoria. She died on Valentine’s Day last year.(CNN.COM/photo:cnn.com)…[+]