Isn’t that the launch/lift system that shoots a laser up inside dome, causing the atmosphere within the dome to super-heat, expand, and provide thrust?
I saw a show on the original test-firings of that thing.
Pretty cool.
Actually no, it's Lazar's model of the anti-matter reactor he says he worked on at Groom Lake.

Rensselaer Polytechnic Institute: Lightcraft Will Use Laser Power for Space Travel