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Washington has hailed the announcement of the military that troop numbers have dropped to below 50,000 in Iraq.
President Barack Obama will make a speech next week to mark the change of mission in Iraq.
John Brennan, assistant to the president for counter terrorism and homeland security, says the development reaches the goal set by Obama.
The US is scheduled to end combat operations in Iraq by August 31st. After the deadline, Washington says about 50,000 US troops will remain to conduct support and training missions.