DAY OF REMEMBRANCE: MARSHALL CENTER DIRECTOR PATRICK SCHEUERMANN WELCOMES TEAM MEMBERS AND GUESTS TO THE LOBBY OF BUILDING 4200, WHERE THE CENTER HOSTED A BRIEF GATHERING JAN. 30, INCLUDING A MOMENT OF SILENCE TO REFLECT ON THE LIVES OF THE LOST APOLLO, CHALLENGER AND COLUMBIA CREWS, AND ALL THOSE WHO HAVE GIVEN THEIR LIVES IN PURSUIT OF NASA'S MISSION