Janet Petro take part in a ceremony paying tribute to the crews during NASA's Day of Remembrance observance.

At the Kennedy Space Center Visitor Complex, Center Director Bob Cabana (center) and Deputy Director Janet Petro take part in a wreath-laying ceremony paying 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. At right is United Space Alliance Vice President of Launch and Recovery Systems and Florida Site Executive Mark Nappi. The public was invited to the wreath-laying ceremony in front of the Space Mirror Memorial. Photo credit: NASA/Kim Shiflett