On April 22, UAL108, a B767, was cruising at FL330 enroute to EDDM and was just east of Long Island NY when the flight crew decided to turn around and return to KIAD because of a fuel leak. They declared an emergency and were given vectors to dump fuel over the ocean before making their way back to KIAD. The flight landed safely on KIAD's runway 1R about 80 minutes later and taxied off the runway and came to a stop where they were met by emergency vehicles to inspect the aircraft.
https://www.flightaware.com/live/flight/UAL108/history/20240422/2125Z/KIAD/KIAD
