President Barack Obama said on Tuesday the threat of nuclear weapons remains a potent challenge for the globe to confront, telling foreign leaders that ``the security of the world depends on the actions that we take.''
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Obama says threat of nuclear weapons remains
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Obama faces a 'hornet's nest' in the Middle East:
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Obama says US will stand by Japan
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Obama tells us: world economic rules have changed
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Security concerns of the country is our priority:
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Obama says oil drilling must be done responsibly
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Obama to Democrats: 'We still have to lead'
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Obama says Africa must take charge
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Obama demands ``bold'' action
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Obama warns 'violence is not the answer'
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Sting says Obama might be divine answer to world's problems
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Obama calls for serious dialogue with Iran
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Obama vows to lead world on climate change
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Obama vows new era of US engagement with world
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Obama says terror threat for us not go away soon
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Obama: 'I will change the world'
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'Our security is at stake'