NASA Photo ID: STS41C-02-054      File Name: 10061461.gif 
 
Film Type: 35mm cn                Date Taken: 04/15/84 
 
Title: Astronauts van Hoften and Nelson conduct pre-breathing exercise 
 
Description: 
 
Astronauts James D. van Hoften and George D. Nelson, wearing Shuttle launch  
and entry helmets, conduct a pre-breathing exercise on the forward flight  
deck of the shuttle Challenger during the STS 41-C mission.