The Millenium Challenge was 2002, predating Biden by about 20 years, and was the same year Iran was named as part of the "Axis of Evil".
https://en.wikipedia.org/wiki/Millennium_Challenge_2002
https://en.wikipedia.org/wiki/Axis_of_evil#2002_State_of_the...
Yes, Iran had had nuclear ambitions for decades. How is that relevant?