Question: PSA Flight 182 was the deadliest crash in US aviation history until the flight that left which Chicago airport a year later?
Sentence (from "PSA Flight 182"): Pacific Southwest Airlines (PSA) Flight 182 was a Boeing 727-214 commercial airliner, registration, N533PS that collided with a private Cessna 172 light aircraft, registration, N7711G over San Diego, California, at 9:01 am on Monday, September 25, 1978.
Relevant evidence: Yes