July, Aug. 2002: Two bridges in Central China collapse, killing a combined 19 people. Sept. 2001: The Queen Isabella Causeway in Texas collapses after a tow boat captain loses control of a string of barges and currents drive them into a bridge support.
The average flying time for a direct flight from Bemidji, MN to Chicago is 1 hour 36 minutes; Most direct flights leave around 9:36 CST
Alaska Airlines now allows free changes/cancellations if made at least 60 days prior to travel. Allegiant Airlines is a bit more specific, stating in its rules that you may cancel as long as your scheduled flight is at least 168 hours (24 x 7) away at time of booking.