Michelle Obama eats lunch with school children at Parklawn Elementary School in Alexandria, Va., in 2012. The first lady unveiled new guidelines Tuesday aimed at cracking down on the marketing of junk food to kids during the school day. Saul Loeb/AFP/Getty Images hide caption

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Saul Loeb/AFP/Getty Images

First Lady Michelle Obama at the White House on May 9. John Stillwell / pool/Getty Images hide caption

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John Stillwell / pool/Getty Images

Stuffed animals and flowers at a makeshift memorial near the entrance to the grounds of Sandy Hook Elementary School. Brendan Smialowski /AFP/Getty Images hide caption

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Brendan Smialowski /AFP/Getty Images

Mitt Romney speaks Thursday at American Legion Post 176 in Springfield, Va. Alex Wong/Getty Images hide caption

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Alex Wong/Getty Images

Ari Shapiro interviews Bobbie Lussier on Thursday.

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