I am taking the position of Mohamed El Baradei, the International Atomic Energy Association Director General regarding the aluminum tubes.
Here is a
Wahington Post article about the subject. Most experts said that the aluminum tubes could not be used for unranium enrichment without massive reengineering, and that the technique would require advanced technology that Iraq did not possess.
The IAEA is very reliable. I tend to trust them far more than I trust the current administration.