Nasa endured the challenger disaster when group members conformed with top managers' decisions that launching the space shuttle in freezing temperatures was better than missing the launch window. this is an example of what group process?

This is an example of groupthink

Explanation:

Groupthink is phenomemon which happens when a group of people who have a strongdesire for harmony or conformity in the group  make decisions which lead to an irrational or dysfunctional decision-making outcome. Groupthink makes individuals to avoid raising controversial issues or alternative solutions, leading to loss of individual creativity, uniqueness and independent thinking. Here the group members avoided conflict and this led to overlooking the facts and has lead to disaster.  

when the united states took over