This interactive bar chart compares flight delays across major U.S. airlines for 2015, breaking down total delay minutes by cause (carrier, NAS, security, and weather). It uses the Dimple.js API on top of D3 v3 to render the visualization, filtering the data to show only security delays initially. A click button triggers an `updateData()` function that replaces the chart with a narrative explaining that security delays account for a minimal percentage of total delay time. The data comes from a CSV file of Bureau of Transportation Statistics, with axes and legends styled through Dimple's chart and series objects.