Three young adult killer whales — members of the family groups that spend their summers chasing salmon around Washington's San Juan Islands — have not been seen in weeks and are feared dead, researchers said Tuesday. One of the orcas leaves a 4-month-old orphan, whose care apparently has been taken over by another female. The three salmon-eating orca families that frequent the state's inland waters are J, K and L pods. J-pod spends virtually the entire year in the waters north of Puget Sound, while the other two groups head out to the open ocean in winter. The pods, called...