In this Jan. 14, 2009 file photo, Spanish U.N peacekeepers patrol the area where a rocket fell short in Lebanon several kilometers north of the Israeli border, near the village of el-Meri, southern Lebanon. Russia's aggressiveness in the east. The Islamic State group's sudden rise in the south. As Europe's militaries register new threats close to home, they're now being asked by the United States to make a strong return to peacekeeping around the world as well. (AP Photo/Hussein Malla)
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