Join the Chicago ARTCC on Friday, April 21st for our first ever "C90 Throwdown"! Fly into O'Hare (KORD), Midway (KMDW), or any other satellite airport in the C90 airspace for a fully staffed C90 from 2300z to 0300z (6:00 PM to 10:00 PM CT). Enjoy full ATC services for 4 hours on April 21st, see you there!