I have read a few bits lately about the Tunnel War in Gaza. Very interesting analysis of how the tunnel system can, or cannot, be reduced in effectiveness. In particular, both articles I read pointed to how limited the Air Assets are in dealing with the tunnels if the objective is to render them unusable, or to massively degrade their usefulness.
The more important bit I gleaned from that article is that reduction of the tunnels is a major objective. It is the long pole in the tent insofar as the IAF / IDF
PR releases regarding their operation in Gaza continuing for a few more months...but Air Power seems to offer little to help that effort at this point.
And that makes sense, from the macro perspective. The tunnel construction was, in part, a counter to the air power assymmetry between sides. (See also North Korea and their tunneling efforts since the 1950's as a way to mitigate their opposition's air power ...)