Iran ahmadinejad missile 06 29 2011

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The US is prepared for more sanctions for Iran.

China says sanctions will not resolve concerns over Iran's nuclear program.

However, Iran says it would only attack if provoked.

An air defense missile is driven past Iranian President Mahmoud Ahmadinejad during an Army Day parade in Tehran on April 18, 2011.

Atta Kenare

AFP/Getty Images