The maternal grandparents of Josh Powell's two sons say the boys were playing happily Sunday and didn't want to visit their father. Charles and Judy Cox tell KIRO-TV that the grandmother talked them into a supervised child custody visit with their father. When the boys arrived at Powell's Washington state home, their father barred a social worker from entering and then lit the house on fire. All three died. Charlie and Braden Powell shared a bedroom in the Cox's Puyallup (Pyoo-AL'-up) home since last fall, when they were removed from their father's custody. The Coxes are parents of Susan Powell, who has been missing since 2009. Josh Powell was a person of interest in her disappearance in Utah/Associated Press. More here. (AP photo: Fire investigators take measurements as they work their way through charred rubble at the home where Josh Powell and his two sons were killed Sunday, in Graham, Wash.)

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