[MediaMole]

I suspect they are thinking about something closer to Rutan's Spaceship One design. Lift the orbital capsule and scramjet booster to an appropriate altitude and speed with a turbojet-powered mothership, use the scramjet to accelerate to near orbital velocity, then use a conventional rocket for the final boost to orbit.

It is still a long way off.

[RightWhale]

They need to be moving several Mach numbers before they can light off the scramjet. This would probably require a rocket. Whether they launch that assembly from an aircraft rather than straight from the ground would be up to the design engineers, but a political decision from higher up might require as much reusable gear as possible without regard to cost.