The Democrat from New Jersey served in the Army Signal Corps during the war. He spent nearly three decades in the Senate and was its oldest member when he died Monday at 89, after suffering complications from viral pneumonia.
Lautenberg was buried on a hillside near the gravesite of President John F. Kennedy. A bugler played "Taps" and soldiers fired three rifle volleys in his honor.
Lautenberg amassed a fortune as a founder of a payroll company. He ran for the Senate in 1982, spending $3 million of his own money to beat Republican Rep. Millicent Fenwick in an upset.
Climbing the Senate seniority ladder, Lautenberg was a strong advocate on issues such as gun control, environmental protections and transportation. He wrote the laws banning smoking on domestic airline flights and setting the national minimum drinking age of 21.
Health problems had forced Lautenberg to miss many votes this year. In April, he returned to the chamber in a wheelchair for votes on gun legislation.