Had this directed to my attention: How NASA might build its very first warp drive I'm guessing the popular science press is overhyping again. I see a brief mention in the article about "negative vacuum energy" and the possibility of "Casimir cavities" being "a way forward" ... which seems to be the extent of the physics mentioned. Isn't "negative vacuum energy" a form of unobtainium? I did see this discussion of energy densities re Casimir effect. I just know people are going to ask me about this - so discussion welcome. What is White on about? What is he actually doing at NASA?