![John Glenn walks with two others as her prepares for his Mercury-Atlas 6 mission](https://www.nasa.gov/wp-content/uploads/2023/03/258356main_s62_330_full.jpg)
Mercury-Atlas 6 Mission Preparation – February 1962
Astronaut John H. Glenn Jr., NASA flight surgeon William Douglas and equipment specialist Joseph W. Schmidt leave crew quarters prior to the Mercury-Atlas 6 mission. Glenn is in his pressure suit and is carrying the portable ventilation unit.
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