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Pakistani President Asif Ali Zardari has arrived in London. Reports say his visit could define Pakistan's troubled relations with the West. Zardari is set to meet with British Prime Minister David Cameron on Friday.
The talks have been overshadowed by Cameron's remarks last week that Pakistan had looked two ways in dealing with terrorists. Zardari denied allegations that elements in his country are cooperating with the Taliban.
He says the international community is losing the war against the Afghan Taliban, and rebuked Cameron for questioning Islamabad's resolve. Cameron defended his comments, but stressed the key is to build on the relationship between two countries.