Also

* Northrop Grumman Corp. said Phil Dur, president of the Ship Systems unit, would step down next month and retire at year’s end. Philip A. Teel, vice president of the Airborne Early Warning & Electronic Warfare Systems unit, will succeed him.

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* Calpine Corp. brought two new power plants into service, one in San Jose and the other in Kaukauna, Wis. The gas-fired plants can produce enough power for about 720,000 homes.