Aha. I had my suspicions that the cleanest bit of concrete with grey aircraft on it could have been military, but there was not enough detail to be sure.
Knowing they were C-130s and finding a list of their bases to check runway diagrams soon got a match with 142nd Airlift Squadron, Delaware ANG.
So it is:
New Castle Airport (KILG)
Wilmington Delaware USA
Interesting to know that Delaware was the only state in the USA that did not have a scheduled airline service until very recently.