1) How do Agile project management approaches relate to traditional (PMI PMBOK) approaches?

2) What is Scrum and how does it relate to Agile methodologies?

3) What are the three main Scrum Roles (or Agile Roles) and how should they serve customer value (what is needed) over constraints (schedule, cost, etc.)?

4) Based on a quick "sweep" of the web (web search), identify and discuss one company or government agency actively using Agile PM (Hint: Search DoD or VA AND Agile or Scrum for many government hits).