USA is definitely going to attack Iran because the US has a stated policy of world domination and conquest, especially against non-Western, developing countries.
Iran can now make its own centrigues to enrich uranium. It will take Iran probably 3-5 years to weaponize into a warhead and successfully develop and mass product ballistic missiles that are reliable and accurate enough to hit Tel Aviv. Israel and the US will 100% make their move against Iran during this time-frame.
Israel and US will not go for an airstrike, that is too indecisive. Instead, Israel and US have no choice but a ground attack. The US has already drawn down troops in Iraq and they are trying to pacify Afghanistan by accomodating with the Taliban. This is all for the purpose of preparing for a ground attack on Iran in the next few years (perhaps after a war on the Al-Assad government in Syria).
The most logical place to attack Iran by land is from Afghistan or Pakistan. The US must be trying to convince Pakistan to let the US use their soil to stage an invasion of Iran, either directly or indirectly through Afghanistan. I think this is why the US deliberately attacked the Pakistani army bases, to force Pakistan to submit and give up its sovereignty.
US will continue to threaten Pakistan and will reach out to india. US wants india to invade Pakistan by land while US provides air cover, in an operation to "prevent Pakistan's nuclear weapons from falling into the hands of extremists in the event of an Islamist take-over of the Pakistan government." india is probably a bit scared and doesn't want to be cannon fodder, but india wants to defeat Pakistan so much that it will probably agree in the end.
To defeat the forthcoming indian invasion of Pakistan, the railway link between P-A-K and Xinjiang Automonous Region will be very important for sending troops and equipment.
Pakistan, China discuss rail line to connect *****************-Kashmir with Xinjiang - Economic Times Also important will be getting Nepal, Bangladesh, Sri Lanka and Myanmar to back Pakistan and China against aggression from USA and its ally india.
If Pakistan stands firm against military pressure from india, USA will have a much harder time cracking Iran. Once Iran gets a true nuclear deterrent against Israel, then the whole map of the Middle East changes. Then you really can see Arab mobs overthrow their pro-Western governments, and of course the whole world wouldn't be forced to use dollars to buy oil anymore.