Whether the war in Afghanistan is being won, or negotiated to a conclusion, the US troops are regarded at home as heroes.
In the first of three reports on US military politics, BBC North America editor Mark Mardell examines how popular attitudes to the military might constrain president Obama's foreign policy.
Listen to Mark Mardell's reports from the US on the
increasingly intellectual approach
to military training or
read more and join the debate on his blog.
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