In this photo taken March 25, 2019, a row of food delivery robots awaits pickup orders outside the student union at Northern Arizona University in Flagstaff, Arizona. Dozens of cooler-size robots on wheels have begun rolling around the university's main campus in Flagstaff to deliver meals from Einstein Bros. Bagels, Cobrizo Mexican Grill and other retailers to hundreds of students a day. (Svea Conrad/Arizona Daily Sun via AP)
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