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Link here. It is the 25th anniversary this week of the space shuttle mission that installed the two cameras that fixed the mirror issue on the Hubble Space Telescope, and the press release at the link provides a nice short overview of that mission, and what was involved to make it happen.
Of course, for a much more detailed look at this story, you could also buy and read A Universe in a Mirror. There are a lot of very fascinating stories that no single press release can possibly mention that I described with glee in writing this book.