It can be easy to overlook the sacrifices the brave men and women in our space program have made, since there have been so few space disasters, relatively speaking. But January 27 is set aside as NASA’s Day of Remembrance, to honor the crews of Apollo 1, and the space shuttles Challenger, and Columbia, who were lost in different tragedies, the first of which (Apollo 1) took place on January 27, 1967.