In memory of brave explorers

Astronaut John Bull, right, models the new Apollo pressure suit incorporating changes recommended by the NASA Apollo review board on Jan. 22, 1968. At left Astronaut Jim Irwin wears the replaced suit. Changes were made after the disastrous Apollo capsule fire which cost the lives of three astronauts. In background is a grid board used as reference during measurement and mobility tests of the suit. (AP Photo/Pool)