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Amazon is taking more control over how a package lands on your doorstep, but the company isn't trying to destroy UPS, CEO Jeff Bezos said at the Code Conference in Rancho Palos Verdes, Calif., on Tuesday evening.

Industry experts have reason to be suspicious. The e-commerce giant has recently starting leasing airplanes and buying up truck trailers. The goal, however, is to simply supplement the delivery capabilities of U.S. Postal Service and UPS, but do so "heavily," according to Bezos.

"We're growing our business" with the USPS and UPS, he said in an onstage interview with Walt Mossberg.

Bezos did, however, hint at another motivation: Getting better terms on delivery contracts with companies like UPS.

"Better prices on transportation would be acceptable to us," he deadpanned.

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