The men were both employees of the Afghan branch of DHL, an international courier service.

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With its asset-light, debt-free business model, the transport and logistics company is taking advantage of lower costs and prices, buying up businesses and stretching its reach to become the premier courier service linking the emerging and fast growing Asian and African economies.

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She had a courier service.

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The key to the service is picking the right courier, says Mr Allason.

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"UPS and FedEx are doing just fine, " Obama said, referring to private courier services that compete with the U.S. Postal Service.

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The postal service still has miles to go before becoming Amazon's courier of choice.

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In one operation, spot-checks by the FDA and the U.S. Customs Service found that 88 percent of drugs imported into the country by mail or courier violated federal safety standards in some way.

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The Postal Service would also be freed up to seek new revenue by forming alliances with global logistics and courier companies.

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