Why didn't David Gregory correct Rick Santorum?

The rising star among the Republican slate of dim lights vying for the GOP's nomination for the presidency, Rick Santorum waxed threatening on the 'influential' during an interview with 'Meet the Press' moderator David Gregory.

Bold as brass he promised, that if elected president, he would 'bomb' Tehran if Iran refused to allow UN inspection of its nuclear sites. You would think the former senator would have his facts straight. He doesn't. UN monitors do inspect Iran's nuclear sites!

More troubling, though: media star Gregory didn't challenge Santorum on misstating the truth. This omission speaks volumes over the fecklessness of the US media; they are there to be handmaidens of the power elite, not the derring dos who speak truth to power.