I was taking a look on flightarrivals.com, and there was a flight Northwest 673 left MSP, and was arriving at MSP. It is operated by a Boeing 727, and left MSP 1 hr 12 min ago. It came in from Detroit at 4:28 pm, and left MSP at 5:10 pm, and is expected back in MSP at 6:12 pm. What's going on!? I bet it's probably an error.