The airplane is a Martin B-57F. It is a version of the English Electric
Canberra. The "F" was a very limited rebuild of the B-57B with much bigger
wings, different engines including two additional small engines in pods
slung under the wings. This was an intelligence gathering airplane. NASA
took off the two underwing engines and used (or maybe uses) it for upper
atmosphere research.

Tom Inglima

To the best of my knowledge none are left in USAF service but NASA
"Keith Edkins" wrote in message
...
Forgive my boundless ignorance and the minimal photo quality, but what is
this? Seen over east Cambridgeshire, England 13th Aug.

Keith