WASHINGTON - U.S. Sen. Frank Lautenberg, a multimillionaire New Jersey businessman and liberal who was called out of retirement for a second tour of duty in Congress, has died at age 89.

His office says the nation's oldest senator and the last remaining World War II veteran serving in the Senate died of complications from viral pneumonia at a hospital in New York City Monday. 

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Lautenberg had health problems in recent years. A bout with the flu caused him to miss the Senate's Jan. 1, 2013 vote to avoid the fiscal cliff of rising taxes and falling government spending.

He had been diagnosed in February 2010 with lymphoma of the stomach and underwent chemotherapy for the next few months.

Lautenberg grew up poor in Paterson, where his father worked in a silk factory and died at 43. He used the G.I. Bill to attend Columbia University and went on to found the multimillion-dollar company Automatic Data Processing

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