The Weekly Standard tells
how, months after requesting a visa to travel to Iran to check for themselves, the Iranian government only sent back a letter with weak statements and self-righteousness. Kansas Republican Mike Pompeo's reply was:
"This absurd letter from the Iranian Foreign Ministry is unsigned, months overdue, and refers to our request for visas to travel to Iran as a 'publicity stunt.' It is not responsive to our request, and is an attempt to distract from some of the Ayatollah's far more dramatic 'publicity stunts' such as writing 'Israel must be wiped out' on ballistic missiles, plotting to blow up a restaurant in Washington, D.C., and kidnapping American sailors on the day of the State of the Union. Our request was never a publicity stunt. It was, and remains, a serious attempt to accomplish important tasks for the American people. I ask the government of Iran yet again, grant our request for a visa."
Tragically but predictably, Iran's government won't. The USA is one source, if any, whose validity is one the Iranian governments don't want to recognize, unlike the UN, who in their current incarnation they can rely upon to do nothing.