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GARY T. WINNETT, et al.,
Plaintiffs-Appellees,
v.
CATERPILLAR, INC.,
Defendant-Appellant.


No. 07-6275

Appeal from the United States District Court
for the Middle District of Tennessee at Nashville.
No. 06-00235—Aleta Arthur Trauger, District Judge.
Argued: September 23, 2008
Decided and Filed: January 27, 2009
Before: MARTIN, ROGERS, and SUTTON, Circuit Judges.

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OPINION
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BOYCE F. MARTIN, JR., Circuit Judge. Plaintiffs are retired workers from Defendant Caterpillar. They argue that Caterpillar breached its promise to provide lifetime retiree medical benefits at no cost when it began charging them for a portion of their medical care. Most of their claims turn on whether a 1998 collective labor agreement provided workers with a right to no-cost retiree medical benefits that vested as soon as the worker became eligible for retirement or a pension. We hold that it did not. Accordingly, we REVERSE and REMAND for further proceedings.