Where's level 2/3 fusion - a look back over the past 10 years

Since its conception the JDL model has provided the fusion community with a way to describe and understand various activities in the data fusion community. As the community continues to make great strides and advancements, primarily in the Level 2/3 arena, a greater understanding is coming about. As a result it is time to revisit the model and to incorporate these lessons learned. In this paper we look back at past accomplishments as a basis to discuss where we might further advance in the next decade toward higher levels of fusion. In doing so we propose refinements to the existing definitions and model of the various levels (as defined by the Joint Director of Laboratories, JDL) and based on these definitions, discuss how each of these levels interact.