That led me to finding how Katrina contracts were being awarded by government Department. It's been tough to identify just which contracts were awarded to Halliburton since most of them are to subsidiaries. I'm working to gather all of those. The data was gathered from the Federal Procurement Data System (FPDS).
This is a very simple analysis, well not really much analysis at all, but in this instance, given the amount of information I want to display, I actually think the pie chart works better. Thoughts?