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It’s Tuesday, which means you may have spent the evening mourning iTunes, which, as my colleague Kevin Roose put it, was dragged to “the great trash can in the sky” on Monday at Apple’s Worldwide Developers Conference. (Other highlights from that event included the unveiling of a $6,000 Mac and a separate app store for the Apple Watch.)

The closely watched conference came the same day news broke that Apple was among the tech giants facing mounting scrutiny from federal regulators.

In other words, Monday was a big one for Apple’s core business — but that’s not why my colleague Thomas Fuller recently visited the company’s new headquarters. He wrote about how he ended up in Cupertino for his new piece on earthquake safety:

When I arrived in San Francisco a little over three years ago I looked out of my office window at swinging construction cranes and wondered whether the city had fully investigated the risks of a high-rise building boom in an earthquake zone.

The question set me on a journey of discovery, to Apple’s new headquarters in Silicon Valley and ultimately to write a story we published today about what some engineers describe as a major shortcoming in California’s earthquake preparedness.