Her middle school security guard held her captive for 10 years. Now Tanya Kach is revealing how she survived a decade locked upstairs

Tanya Kach was 14 years old when she vanished in 1996. A decade later, she was found at her middle school security guard’s home, where she was being kept captive. Now, with the help of fellow kidnapping survivor Elizabeth Smart, she’s telling her story. Andrea Cavallier reports