California's population is in no way similar to Scotland's. Also not sure why the space shuttle, Mickey Mouse, the Beach Boys, the fastest plane ever built, and the electric guitar aren't good enough for you.
This has been discussed in previous comments, but perhaps this sentence can be reworded: 'The fastest airplane of all-time, designed at Lockheed Martin's "Skunkworks"' - maybe the sentence could state 'fastest airbreathing airplane...' or 'fastest jet-powered airplane'. Technically, 'crewed' or 'manned' should be added in there as well, since the X-43A is both an 'airplane' and is faster than the SR-71.
Thanks for the quiz anyway.