The family next to the misile silo

Yes, and they knew that, which is why you saw them trying to leave, but they took too long. When the emergency broadcast announcement came on, the parents were too busy having a quickie. The little boy watching the TV at the time even knew something was up, but the two farmer parents (not the Dahlberg's) chose to ignore it for a while. They didn't become alarmed until they actually found out the missile from the silo not even a mile from their house began to lift itself up. Then, they panicked. They tried to load as much stuff as they could into the back of their truck, but as soon as they were about to leave, they were caught in a ground explosion.