was so specific, the suspect had planned what to do minute by minute. it's thursday, august 18th. >> announcer: from abc news, this is "world news now." good morning, everybody. i'm rob nelson. >> and i'm diana alvear. tampa police say an anonymous tip led them to 17-year-old jared cano's home where they found explosives in his bedroom. investigators also found suspicious posts on the boy's facebook page. >> if this would have been carried out, it would have b been the worst massacre since columbine. so scary. also ahead, a major advance for treating a form of skin cancer. for the first t time a pill can actually shrink aggressive tumors. ving cancer fighters the upper hand. >> that's great. >> very encouraged. later this half hour, looking good for back to school. check out stylish, affordable clothing and cutie kids for students of all ages. >> kids of all ages, including our producer, jack. we'll get to all that in just a second.