Recent support was provided by DOE and ARPA as part of the Hypercomputing and Design (HPCD) project, contract DABT-63-93-C-0064. The turbulence simulation was produced by Dr. Shiyi Chen at Los Alamos National Laboratory. Mr. Jim Cao and Ms. Smitha Bhat provided us with the CM5 implementation of the object segment code. Ms. Erin Stryker provided editorial assistance. Computations were done on the Cray C90 at the Pittsburgh Supercomputer Center, on the CM5 at the Advanced Computing Laboratory-Los Alamos National Laboratory and the CM5 at the National Center for Supercomputing Applications.