No, let them keep calling them English....
because it must iritate them to no end; still using units named after the BRITISH EMPIRE, when even the UK and every other sane country on the planet uses SI.
The 'it costs too much' is totally bogus - anyone who does any work in infrastructure can tell you - DO IT NOW, otherwise in 5 years time, it will cost 10 times as much. Ever heard the phrase 'A stitch, in time, saves nine?' It's not just an aphorism, it's actually true.
To be honest, I thought the Shuttle was SI, the insides at least. Or was that one of the design goals, like two-week turnaround?
Spaceflight (human spaceflight at least) is all about minimising risk; you would think having 2 systems of measurement floating around is one elephant-in-the-room risk. *cough* mars probe *cough*
Talk of Imperial always brings to mind the priceless scene in 'Brazil' - Bob Hoskins drops a floor-plate through a slightly-too-big hole int he floor "Oh, buggger, they've gone back to Metric again!"
Scientist - because they know to use SI. (Physics must be a total BITCH in Imperial, or do they just work in Base-12 to make it simple?)