**ADVANCE FOR MONDAY, JAN. 1, ** Sen. Frank Lautenberg is shown in his office in Newark, N.J. on Dec. 14, 2006. With his 83rd birthday approaching later this month, Lautenberg is currently the third-oldest U.S. senator in office. He says his health is excellent and frequent trips to the gym, plus skiing as often as he can, have the senator looking and feeling younger than his age. &#40;AP Photo&#47;Tim Larsen&#41; <span class=meta>(AP Photo&#47; Tim Larsen)</span>
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