CBS news last night ran a news item where American Airlines ( AA ) have grounded its fleet of MD80's.
All 300 of them for an indefinite period, and have canceled thousands of flights.
While good aircraft of their day are now well past their sell by date.
So anyone flying AA to the US and expecting a connecting flight which will almost certainly be scheduled for one of these aircraft to do the internal flight .
Might be a good Idea to check if they will be flying your connection.
The last thing you want is to fly to the US , then spend your 2 weeks holiday stuck in a americian Hub airport.