Just had an interesting experience booking flights using our Corp travel tool which is probably used by many others (Concur). I was booking a flight for 10/24 and it was displaying both AA and US flights, but when I choose the US flight (forgetting the exact US end date) and tried to book it I got an error message that the fare was no longer available. When I searched again, the US flights were again displayed and when chosen gave the same error message. Then the light came on and I selected the AA flight, and of course it worked.

Sure is strange that US flights are still out there in Concur when they don't really exist.