(AP) -- FORT JACKSON, S.C. (AP) - Michelle Obama is coming to the Army's largest training post to see how the military turns couch potato recruits into fit and healthy soldiers.

The first lady addresses the latest crop of new soldiers on Thursday at their graduation ceremony on Fort Jackson in central South Carolina.

Mrs. Obama's battle against childhood obesity intersects with the nation's need to field a fit Army. She will hear Army leaders describe revamped training that

focuses on core body strength and stamina, as well as overhauled chow lines featuring dark greens, whole grains and fat-free milk.

Army officials worry the nation's security is at risk because fewer than one in four 17-to-24-year-olds is fully qualified to enter the military.

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