America wants to negotiate a tacit understanding that would offer Iran a dollop of cash to freeze its nuclear work where it stands. since Donald Trump withdrew America from the 2015 nuclear pact with Iran, American presidents have sought a new bargain with their old foe, Mr Trump, then president, predicted that tough sanctions would compel Iran to sign a “new and lasting deal”. Joe Biden’s administration promised smart diplomacy to craft a “longer and stronger” agreement. Those efforts are sputtering towards an unsatisfying conclusion. Instead of making a deal, Iran has enriched more uranium to higher purity than ever before. Why is the United states trying to prevent Iran from making Nuclear weapons ?