Local NTSB Investigating Air Traffic Incident at O’Hare by Gary Kopycinski on May 20, 2011 Gary Kopycinski Author More in Local: Park Forest’s Sandra Zoellner Retires After 21 Years of Service June 17, 2026 Save the date for The Prairie Party at theNate June 17, 2026 Governors State Has New Soccer Complex and New Men’s Coach June 17, 2026 WASHINGTON–(ENEWSPF)–May 20, 2011. The National Transportation Safety Board (NTSB) is investigating an air traffic control incident involving two regional jets that occurred on Monday, May 16, 2011 at Chicago O’Hare International Airport.