It seems This issue was not yet published (even If I remember maye just an announce) :
Fuel Free Space Travel
NASA researchers rattled the propulsion community lastyear when they reported generating thrust inside a vacuumchamber with electromagnetism instead of propellants. Wasthe effect real or a product of an unknown source of error?Adam Hadhazy spoke to scientists who aim to find out.
Is it a breakthrough, or baloney? Not longafter the turn of the millennium, the EmDrive— catchy shorthand for “electromagneticdrive” — was a mere glimmer at the fringesof space-propulsion research.