This is not the first experiment undertaken by Nasa/Pentagon/Boeing or the DoD. As well as similar measurements confirmed by other research teams (including foreign teams).
I totally agree it requires drastic evidence, but it could be explained by another physical action not necessarily the violation of Newton's laws or effects that supersede those laws like quantum effects
https://drive.google.com/file/d/0B7kgKijo-p0idV9tcmVIVzZrdTQ...
http://www.ibtimes.co.uk/emdrive-exclusive-roger-shawyer-con...
http://www.slideshare.net/KurtZeller/investigation-of-a-part...