Teams are more than just a collection of individuals pursuing their own goals. A commonly accepted definition of teamwork is a collection of (two or more) individuals working together inter-dependently to achieve a common goal (Salas et al., 1992). The structure of a team may range from rigid, with clearly defined roles and a hierarchical chain-of-command, to flexible, where individuals all have similar capabilities, tasks are allocated flexibly to the best available team member, and decisions are made jointly by consensus. While some teams are formed and exist only transiently, other teams are more persistent, training together and operating over an extended duration to solve a series problems or perform many tasks.