Guests pay tribute to the crews of Apollo 1 and space shuttles Challenger and Columbia during NASA's Day of Remembrance observance.

At the Kennedy Space Center Visitor Complex, guests pay tribute to the crews of Apollo 1 and space shuttles Challenger and Columbia, as well as other NASA colleagues who lost their lives while furthering the cause of exploration and discovery, during NASA's Day of Remembrance observance Jan. 29. The public was invited to a wreath-laying at the Space Mirror Memorial at the visitor complex. Center Director and former astronaut Bob Cabana took part in the ceremony. Photo credit: NASA/Kim Shiflett