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Bradley Manning trial due to start

3 June 2013 Last updated at 06:04 BST

The US soldier accused of causing America's worst ever national security breach goes on trial on Monday.

Bradley Manning is accused of leaking hundreds of thousands of classified government documents to the website Wikileaks.

He has pleaded guilty to several offences, including breaches of military discipline, but denies the most serious charge - that of knowingly aiding the enemy.

David Willis reports from Fort Meade in Maryland.