Obama to U.N.: OK, America Will Be World's Police

Foreign Policy:  President Barack Obama reasserted America's leadership in the Middle East after years of retreat from the region, calling on the world to join U.S. forces in the war against the "evil" self-styled Islamic State and other extremist groups.

Reason to heed his call came mere hours later, when news of yet another beheading of a Westerner at the hands of radical Muslims, this time in Algeria, surfaced.

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