Yes I remember the gate part of the story. but are they sure the Muslims are building an underground Mosque?
With a bulldozer, behind the retaining walls that the mosque is built on. Anybody in construction knows that you never use a bulldozer behind a retaining wall, you have to use a backhoe. But the Islamics are not in the construction business, they are in the destruction business. In that case you always use a bulldozer.