"the challenger space shuttle disaster occurred when some concerns about the possibility of problems were not adequately considered. this example shows the dangers"

This shows an example of dangers of groupthink. This is a psychological phenomenon in which everyone in a group goes along with a choice without critical evaluation of alternate ideas or standpoints. The need for harmony or conformity is so strong that no one dares to say, “Wait a minute, this may not be such a good idea.”

a. the moon was locked into orbit by the earths gravity as it was passing by and capture hypothesis i think