was never able to determine if Iran was keeping their word.

"Moreover, each quarter since the deal has been implemented in January 2016, the IAEA has reported that it still has not been able to determine that Iran has no undeclared nuclear facilities and materials and thus cannot conclude that Iran’s nuclear program is peaceful. While Iran has been pressed successfully to stop its multiple technical violations of specific nuclear limitations, the basic proposition of whether Iran seeks nuclear weapons has not been answered in the three plus years since the deal commenced".
The problem persisted until Trump put an end to Obama's JCPOA.


This article from Albright in 2019 highlights the lack of verifiability with this lying, terrorist state (Iran),
In his conclusion, Albright also pointed out some of the same issues that Eli pointed out.

They were playing you all along, and your ego won't let you admit the truth.


Link: https://nationalinterest.org/feature/dont-rejoin-iran-deal-fix-it-50742