Trump's big decision time

The danger with having a weapon system that was specifically developed to destroy deeply-buried military/nuclear bunkers is that if they don't do the job properly, there will be a huge anti-climax. Donald Trump, by all accounts, is worried that the Pentagon's Massive Ordnance Penetrator, 30,000lbs in weight and supposedly capable of breaching 200ft of concrete, won't actually reach Iran's most secret uranium-enrichment plant at Fordow south of Tehran which is half a mile down. Will the detonation from the MOP spread down far enough to destroy the plant? The reality is that the US might have to drop four or five of the $3 million MOPs, each one going down through the hole achieved by the previous one. Then it might be possible for the MOPs to get their targets. It's a big IF. Trump won't want to drop the bombs and discover that Iran's fuel-enrichment facility is untouched. That would be seriously embarrassing and make the whole effort look unachievable. That would be a huge bonus to Iran. Wars are rarely, if ever, won by airstrikes alone. Can the MOP do what other bombs in the past have failed to do - bring Iran to its knees and force it to give up all idea of building a nuclear bomb? Trump must be hoping so but it's why he has so far hesitated to give the go ahead for an American strike.