Seven children died in a fire at a Pennsylvania farmhouse Tuesday while their mother milked cows and their father took a nap in a milk-delivery truck. The children were aged 7 months to 11 years old. One child, who survived, smelled smoke and ran to the mother, who then called 911 and went to the father for help. By the time they arrived together at the home, firefighters were already fighting the blaze. The cause of the fire is unknown.