title: Hierarchy Query for linked work items in TFS
body: <p>I am using TFS 2010.<br>
  I have many work items (requirements, test cases...)<br>
  The work items are linked. I know how to do a query to see the hierarchy of the work items, but when I want to export them to Excel I have just the option to do a flat report.<br>
  How can I export a Hierarchy report of work items?</p>