Today is the official day of remembrance for the Apollo 1, Challenger, and Columbia tragedies. I've previously posted about Apollo and Challenger - today is the 10th anniversary of the loss of space shuttle Columbia, which perished upon reentry in 2001.
As we undertake the next generation of discovery, today we pause to remember those who paid the ultimate sacrifice on the journey of exploration.
Space exploration and the sacrifice these pioneers made benefits us all.
So while the Day of Remembrance is in part a time of sadness, it is also a time of contemplation and thankfulness. It is a time to be thankful that these great men and women shared their lives with us; that they helped advance our nation and made life better on Earth; and that they are still united with us in that shared pursuit.