As the U.N. nuclear watchdog’s governing body prepares to meet for the first time since US President Barack Obama took office, concerns are growing over two would-be nuclear states.The International Atomic Energy Agency reported last month that Iran had significantly increased its stockpile of low-enriched uranium since November. And some experts say Tehran has enough of the material to convert into one nuclear bomb. Iran says its atomic work is peaceful and aimed at generating electricity. It began testing at its newly opened nuclear power plant at Bushehr last week. But Iran has been enriching uranium at another facility in defiance of U.N. Security Council demands to stop. The IAEA will also consider calls for a rare mandatory “special” inspection in Syria after Damascus refused to give voluntary access to resolve allegations of covert atomic activity.