They're Taking Over The World

I was reading an article about a planning request for wind turbines being turned down and this paragraph leaped out at me

It is the second time Ecotricity has submitted plans for the site. Its previous proposal, which critics claim is identical, was thrown out by councillors last November.

A key factor of that decision was that the Ministry of Defence (MoD) had opposed the development on the grounds that the turbines would pose a threat to national security.

Since then the MoD has withdrawn its objection.

What! I'd like to see what their reasoning was.