1. What is the minimum amount of uranium needed to arm a nuclear warhead?

2. What is the IAEA?

3. What did IAEA weapons inspectors say in a recent report about Iran's nuclear program?

4. What do experts say about the purity of the enriched uranium?  (see paragraphs 3 and 11)

5. For what reason did Iran bar two IAEA weapons inspectors from the country in June?

6. Read the "Background" below, then watch the AP News report under "Resources." What do you think the UN should do about Iran's nuclear program? Do you think they will do so? Explain your answer.