Last Sunday evening, as I was coming into the DC area, I briefly heard an exchange between Potomac approach and United 964. They were coordinating with Potomac to circle and dump fuel.
From the flight track, it looks like something happened:http://flightaware.com/live/flight/UAL964/history/20100613/2117Z/KIAD/UUDD
The flight is a nonstop to Moscow, so they would have had a lot of fuel to dump.
I searched news stories and didn't see anything reported. Anyone know what happened, or have the time to listen to the Potomac feeds and find out?