''Far out, dudes!''

''In August 1997, NASA sponsored a 3-day workshop to assess the prospects emerging from physics that may eventually lead to creating propulsion breakthroughs -the kind of breakthroughs that could revolutionize space flight and enable human voyages to other star systems. Experiments and theories    were discussed regarding the coupling of gravity and electromagnetism, vacuum fluctuation energy, warp drives and wormholes, and superluminal quantum tunneling.''

NASA Breakthrough Propulsion Physics Workshop Proceedings (1999)

https://archive.org/details/nasa_techdoc_19990023204