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Sam Kass cooked for Barack Obama when he was a congressman, following him to the White House when he rose to Presidential office. The Â鶹Éç's Dan Saladino hears how Sam's influence grew outside the kitchen too – from planting vegetables on the White House lawn to advising the First Lady on improving school meals. (Photo: Barack and Michelle Obama with daughters Malia and Sasha. Credit: Chris Kleponis/AFP/Getty Images)