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The U.S. State Department in November exempted the Chabahar Port project from sanctions in recognition of its importance to landlocked Afghanistan.

The effort to build up Afghanistan's economy is also aimed at reducing Kabul's dependence on foreign aid and putting a major dent in the illicit opium trade that has been a major source of revenue for the Taliban insurgency.

New Delhi has poured $2 billion into development in Afghanistan since the 2001 U.S.-led overthrow of the Taliban's government.

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