Students eat their lunch in the cafeteria at Thomas Jefferson High School in Dallas, Friday, April 18, 2014. The cafeteria is among those in the Dallas Independent School District that have been upgraded in the last several years. School districts across the U.S. have been making upgrades in recent years to try and entice children into healthier eating habits amid higher federal nutrition standards that emphasize whole grains, fruit and vegetables. But for many, funding such improvements has been a challenge. (AP Photo/LM Otero)
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