Willow Grove is Closing. This is from Wikipedia. Probably accurate:
Willow Grove Air Force Base To Close
UPDATED: 6:20 pm EST January 4, 2007
Willow Grove, Pa. -- Air Force C-130's will soon be gone from the Willow Grove joint reserve base.
The Air Force Reserve is deactivating the 913th Airlift Wing, which means 1,200 reservists and civilian employees will lose their jobs at Willow Grove.
But the Air Force said it will help those people find jobs at other units around the country.
The 913th Airlift Wing is scheduled to close by Oct. 1.
As for the Me262, I think you are right. Those static displays are definitely gone. No idea where to.