No one was going to blow up the moon. It may be smaller than Earth, but it’s still pretty darn big. As someone else said, we could put a decent crater in it. Even the biggest nukes ever produced (by the Soviets, who else) barely scratch the Earth’s surface. Of course they destroy the heck out of stuff within 10 miles and will leave a big crater with a huge scar....but it’s still no more than a scratch in our planet’s crust.
Not even Tzar Bomba (designed for 100 megaton yield but tested at 50) would have done much more than made a light show and kicked up the dust.
http://en.wikipedia.org/wiki/Tsar_Bomba