That led Chicago police and the TSA to order everyone out of the upper level of the terminal, and they determined that the bag of the package that the dog hit on was not a threat.
During that time, Terminal 2's security check points, bag checks and ticket counters were all off limits.
Of course, that led a lot of people to have to cool their heels and yes, some of their missed their flights.
"I have not heard anything directly from the police and I rebooked my flight with Delta, so instead of getting home at 9:30, be home at 1:30 in the morning or something like that," said passenger.
Long lines now greet that gentleman, and every other flyer of Delta and U.S. Airways, the two dominant carriers who use Terminal 2.
It was just a false alarm that has led to a lot of frustrated flyers.