Coincidentally, I've just returned from a brief trip to San Diego, where I had
time to look at the SD Aerospace Museum in Balboa Park. Very professionally
done, and well worth working into any visit to San Diego. At the entrance are
two planeguards, an SR-71 and the first Sea Dart I've ever seen.

There was a Sea Dart over at NAS Norfolk back in April of 1968. Cockpit was
closed but no other protection on the Jet. There was also a "Pogo". Do not
know what ever happened to them..
Frank