1. J. J. Hester, S. J. Desch, and K. R. Healy are in the Department of Physics and Astronomy, Arizona State University, Tempe, AZ 85287-1504, USA.
2. L. A. Leshin is in the Department of Geological Sciences and Center for Meteorite Studies, Arizona State University, Tempe, AZ 85387-1404, USA.