WJLA , a 13-year-old Maryland boy , provided firefighters with instructions . Smelled smoke when family 's Clinton home caught fire Sunday morning . Was trapped in a second-floor bedroom with nine-year-old sister during fire . Soothed his sister after she blurted out 'We 're going to die ' during the call . Siblings saved and three other people in the home escaped without injury .
Marcus , a 13-year-old Maryland boy , provided firefighters with instructions . Smelled smoke when family 's Clinton home caught fire Sunday morning . Was trapped in a second-floor bedroom with nine-year-old sister during fire . Soothed his sister after she blurted out 'We 're going to die ' during the call . Siblings saved and three other people in the home escaped without injury .