CAPE CANAVERAL, Fla. – In front of the Space Mirror Memorial at the Kennedy Space Center Visitor Complex, floral arrangements and exhibits 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. Center Director Bob Cabana presided over the wreath-laying ceremony, which was open to the public. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – 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

CAPE CANAVERAL, Fla. – Near the Space Mirror Memorial at the Kennedy Space Center Visitor Complex, a floral wreath has been placed during NASA's Day of Remembrance observance 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. Center Director Bob Cabana presided over the ceremony, which was open to the public. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At the Kennedy Space Center Visitor Complex, Center Director Bob Cabana takes part in a ceremony paying tribute to the crews of Apollo 1 and space shuttles Challenger and Columbia, as well as other NASA colleagues, during NASA's Day of Remembrance observance Jan. 29. The public was invited to the wreath-laying ceremony in front of the Space Mirror Memorial, on which are engraved the names of NASA's heroes who lost their lives while furthering the cause of exploration and discovery. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Near the Space Mirror Memorial at NASA's Kennedy Space Center Visitor Complex, a large plaque commemorates the crews of Apollo 1 and space shuttles Challenger and Columbia who lost their lives while furthering the cause of exploration and discovery. At left is Tara Gillam, manager of the Office of Diversity and Equal Opportunity at Kennedy. Jan. 29 is NASA's Day of Remembrance observance and included a wreath-laying ceremony in front of the Space Mirror Memorial. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – 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

CAPE CANAVERAL, Fla. – At the Kennedy Space Center Visitor Complex, Center Director Bob Cabana (center) takes 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 left is Janet Petro, deputy director of Kennedy; 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