NASA cancels first ever all female Space walk mission to be held on 29 March 2019. NASA sites lack of right size space suit as the reason. Anne McClain & Christina Koch were assigned for all female space walk. Astronaut Nick Hague will replace McClain on March 29. McClain finished her first Spacewalk last week & said medium size fits her better. NASA can manage only 1 medium-sized suit in time for the walk. Over-sized space suit will cause trouble in mobility & will create hurdle to complete the mission. When you have the option of just switching the people, the mission becomes more important than a cool milestone, says NASA Spokesperson.