On Oct. 11, 2014, an unidentified flying object appeared over Camp Randall.

Between the third and fourth quarters of a Saturday football game against The Fighting Illini, a small white drone hovered over the stadium, the nasal whine of its four rotors lost in the revelry of “Jump Around.” Bearing no identification marks and carrying an underslung camera, the aircraft lingered for several minutes before departing, leaving no trace of its pilot or origin.

The drone’s presence defied a nationwide security measure prohibiting flight over major stadiums while sporting events are underway. The incident triggered an investigation by the Federal Aviation Administration and local law enforcement, but the drone’s pilot remains unknown some two years later. In front of a captive audience of thousands, a single operator was able to use a drone to intrude protected airspace and escape without resistance or consequence. Read the full story here.