Amazon is expanding the reach of its U.S. store.

When he was 13, Leo Mandella began posting photos of his street wear outfits to his Instagram account, @gullyguyleo, and with his sophisticated color sense, confident poses and baby face, he was a quick hit. His hundreds of posts earned him a follower count comfortably in the six figures, but still he craved more.

In March, the U.S. Department of Homeland Security and the Federal Bureau of Investigation issued a troubling alert: Since the same month two years before, Russian state-sponsored hackers had been infiltrating the nation’s electricity grid and various infrastructure industries, including aviation, collecting information on how the networks were organized and what systems’ controls they had in place.

Amazon.com Inc. Chief Executive Jeff Bezos said the e-commerce giant has exceeded 100 million paid Prime subscribers and will continue to invest to meet "ever-rising" customer expectations.