Here's an item about Brett Alexander's presentation at Wednesday's House Science & Technology subcommittee hearing on human spaceflight safety: CSF President Bretton Alexander Testifies Before House Science Committee on Spaceflight Safety - Commercial Spaceflight Federation.

Brett's testimony (pdf) and those of the other witnesses are available via the Hearing page (see linked names on left hand column.)
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The written testimonies of the witnesses at Wednesday's Commercial Space Transportation hearing are available via the Hearing announcement page. Just click on the witness names on the right column. (Unfortunately, the link for Jeff Greason's testimony is broken.)

Gerald L. Dillingham written testimony consists actually of a GAO report on the status of the FAA's commercial space transportation role as regulator and promotor of the industry: Development of the Commercial Space Launch Industry Presents Safety Oversight Challenges for FAA and Raises Issues Affecting Federal Roles - GAO - Dec.2.09 (pdf).