U.N.: Iran Accelerating Nuclear Program

The United Nations nuclear watchdog says Iran appears to be accelerating its nuclear program. A report based on inspections of Iran's nuclear facilities last month says the country has installed more-advanced machines for enriching uranium and moved them underground, where they'll be less vulnerable to airstrikes. The report also expresses concern that Iranian scientists are researching nuclear-warhead designs. Iran maintains that its program is peaceful, and the upgraded enrichment machines are for medical purposes.