Iranian Supreme Leader Ayatollah Ali Khamenei said that Iran has no intention of developing nuclear weapons, but if it wanted to, the United States could not thwart it.
The West and Israel suspect the Islamic republic is masking the development of an atomic weapons capability under the guise of a nuclear programme that Iran insists is purely peaceful.
US President Barack Obama on Tuesday urged Tehran to "recognise that now is the time for a diplomatic solution" to the nuclear stand-off.
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