A delegation from the state-owned Chinese company, China Metallurgical Group Corporation, visited the site of a copper mine in Aynak, a former al-Qaeda stronghold southeast of Kabul, in 2007. Credit...James R. Yeager/Associated Press KABUL, Afghanistan � Behind an electrified fence, blast-resistant sandbags and 53 National Police outposts, the Afghan surge is well under way. But the foot soldiers
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