[iMore.com]

As much as the year is made up for small moments, of hours and days and weeks that record a steady beat of news from one to the next, it's also punctuated by canons, by shots that shake us, challenge us, and forever change our awareness. Sometimes they're the result of great achievements, of remarkable new products or discoveries. Other times they're the result of tragedy, of terrible acts or revelations. 2013, like all years, had its share of both. These are, in our opinion, the most important of them.

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