Flown segment of the Dragon's solar array structure recovered after the failed CRS-7 mission on June 28, 2015, measuring 1.25? x 1.25?, encased 2.25? Lucite marked with the SpaceX logo and "CRS-7." In very fine condition. These presentations were prepared for SpaceX engineers and employees as a reminder that launching safely and reliably is everyone's duty, and that work should be triple-checked for quality control. Accompanied by a letter of provenance from SpaceX board member Steve Jurvetson, noting that the piece testifies to "the hard work on the path to success, and the learning from failures, in this case, the failure of a third-party eye bolt that secured a strut internal to the second stage's liquid oxygen tank."
