The secret legal opinions issued by Bush administration lawyers after the Sept. 11, 2001, attacks included assertions that the president could use the nation's military within the United States to combat people deemed as terrorists and to conduct raids without obtaining a search warrant.

That opinion was among nine that were disclosed publicly for the first time Monday by the Justice Department, in what the Obama administration portrayed as a step toward greater transparency. The opinions showed a broad interpretation of presidential authority, asserting as well that the president could unilaterally abrogate foreign treaties, deal with detainees suspected of terrorism while rejecting input from Congress and conduct a warrantless eavesdropping program.

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