Kevin Systrom
40u40 main kevin systrom
Age: 28
40 Under 40 rank: 18

You know what, the lowest point was the first day we launched Instagram. We had everything set up, all this press out, everyone looking at us, and our server immediately crashed because it was over capacity. I told myself that maybe we just blew our one chance at everyone being excited about us. Obviously, that wasn't the case.

  @FortuneMagazine - Last updated October 11 2012 10:33 AM ET
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