This video introduces Visibility functionality in Military Tools for ArcGIS in Web AppBuilder. Visualizing the terrain and understanding its impact is a crucial aspect of tactical operations. Analysts can determine visibility from key terrain, observations posts, and other locations to assess mission vulnerabilities and determine how to use the terrain to their advantage. The Visibility widget uses elevation data to create radial line of sight information needed for making operational decisions. The Visibility widget determines what is visible from an observer location based on a given distance, an observer height, and a field of view. More information can be found at http://solutions.arcgis.com/defense/help/military-tools/web-appbuilder/visibility-introduction.htm