Frank Burton, Jr., spokesman for the FBI's Philadelphia division, said the theft occurred at some point between when the shipment of bills landed at the Philadelphia airport on a commercial flight from Dallas at 10:20 Thursday morning, and when the shipment reached its New Jersey destination around 2:00 p.m., when the courier service transporting the bills reported some missing.
Burton declined to comment on the amount taken, but said it was substantial.
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"We're following all logical leads," he said
The missing bills carry a design that is not slated to reach circulation until 2013. They feature a large gold "100" graphic on the back, and an orange box on the front with a faint image of the Liberty Bell. 
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