In the US space industry, "go fever" is an informal term used to refer to the overall attitude of being in a rush or hurry to get a project or task done while overlooking potential problems or mistakes. "Go fever" results from both individual and collective aspects of human behavior. It is due to the tendency as individuals to be overly committed to a previously chosen course of action based on time and resources already expended (sunk costs) despite reduced or insufficient future benefits, or even considerable risks. It is also due to general budget concerns and due to the desire of members of a team not to be seen as the one who is not equally committed to the team's goals or to be the one interfering with the team's progress or success. The term was coined after the Apollo 1 fire in 1967 and has been referred to in subsequent NASA incidents such as the Space Shuttle Challenger disaster in 1986 and the Space Shuttle Columbia disaster in 2003.