Neptune's orbit has a profound impact on the region directly beyond it, known as the Kuiper belt. The Kuiper belt is a ring of small icy worlds, similar to the asteroid belt but far larger, extending from Neptune's orbit at 30 AU out to about 55 AU from the Sun. Much in the same way that Jupiter's gravity dominates the asteroid belt, shaping its structure, so Neptune's gravity dominates the Kuiper belt. Over the age of the Solar System, certain regions of the Kuiper belt became destabilised by Neptune's gravity, creating gaps in the Kuiper belt's structure. The region between 40 and 42 AU is an example.
What dominates the Kuiper belt? 
Neptune's gravity

Arts & Sciences at Washington University comprises three divisions: the College of Arts & Sciences, the Graduate School of Arts & Sciences, and University College in Arts & Sciences. Barbara Schaal is Dean of the Faculty of Arts & Sciences. James E. McLeod was the Vice Chancellor for Students and Dean of the College of Arts & Sciences; according to a University news release he died at the University's Barnes-Jewish Hospital on Tuesday, September 6, 2011 of renal failure as a result of a two-year-long struggle with cancer. Richard J. Smith is Dean of the Graduate School of Arts & Sciences.
What positions did James Mcleod hold at Washington University?
Vice Chancellor for Students and Dean of the College of Arts & Sciences

The second presidential debate was held at Washington University in St. Louis, Missouri, on October 8, moderated by Charles Gibson of ABC. Conducted in a town meeting format, less formal than the first presidential debate, this debate saw Bush and Kerry taking questions on a variety of subjects from a local audience. Bush attempted to deflect criticism of what was described as his scowling demeanor during the first debate, joking at one point about one of Kerry's remarks, "That answer made me want to scowl."
Was the second debate held in a rigid, formalistic manner?
town meeting format, less formal