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• 12:39, 30 April 2009 Rrusczyk talk contribs removed protection from 2009 USAMO (hist)
• 12:39, 30 April 2009 Rrusczyk talk contribs changed protection settings for 2009 USAMO ([edit=autoconfirmed:move=autoconfirmed]) (hist)
• 18:26, 27 April 2009 Azjps talk contribs protected 2009 USAMO ([edit=sysop:move=sysop]) (hist)