Hong Kong flight Grounded In Chicago

What: United Airlines Flight 895 Boeing 747 bound for Hong Kong
Where: emergency landing at O'Hare International Airport
When: Saturday 5:27 p.m
Who: 323 passengers and 18 crew members
Why: One hour into the flight to Hong Kong, the pilot experienced unspecified problems with a temperature probe, and rerouted it back to O'Hare.