DAVID KATZ started as one of the first ten employees on Barack Obama's Senate campaign and spent approximately nine months driving, photographing, and serving the would-be president during the 2004 Senate campaign. In 2008, Katz returned after graduating from Stanford's Graduate School of Business to become the official campaign photographer, a position he held from July to November 2008. After Obama was elected president, Katz served in the Energy Department and at the White House in numerous policy roles. He is a frequent golf partner of President Obama and now a technology executive in San Francisco.

MARK BITTMAN, guest editor, is the author of more than thirty books, including the How to Cook Everything series and the #1 New York Times bestseller VB6: Eat Vegan Before 6:00 to Lose Weight and Restore Your Health . . . for Good. He was a food columnist, an opinion columnist, and the lead magazine food writer at the New York Times, where he started writing in 1984 and remained for more than thirty years.