Exterior streams are an essential tool and may be used effectively as part of an offensive or defensive strategy. There is little debate that exterior streams are essential to defensive fire control. However, recent years have seen considerable discussion about the use of exterior streams as a component of an offensive strategy. This workshop examines how exterior streams can be used effectively in both offensive and defensive strategies. Topics include implications of current fire dynamics research on fire streams, direct and indirect attack, factors impacting exterior stream effectiveness, fire streams and air entrainment, and developing a doctrine for use of exterior streams.