NASA Administrator Bolden Pays Tribute To The Apollo 1, Space Shuttles Challenger And Columbia Disasters At Arlington Nat'l Cemetery

ARLINGTON, VA - JANUARY 28: NASA Administrator Charles Boton, Jr., left, talks with June Scobee-Rodgers, widow of Challenger's commander Dick Scobee, and Bobby Watkins, director of the Office of Strategic Analysis & Communications at the Marshall Space Flight Center at the space shuttle Columbia and Challenger memorials during NASA's annual Day of Remembrance at Arlington National Cemetery on January 28, 2015 in Arlington, Virginia. On the anniversary of the Challenger disaster in 1986, NASA staff gather with the crews' families to pay tribute to the NASA crew members who have lost their lives advancing the cause of exploration. (Photo by T.J. Kirkpatrick/Getty Images)