Cover photograph (Copyright © 2005, American Society for Microbiology. All Rights Reserved.): Confocal microscopy images of BHK-21 cells infected with Bunyamwera virus show a massive recruitment of mitochondria (labeled in red) toward the Golgi complex (labeled in blue) where the viral factory is built. Viral replication and assembly take place in these large perinuclear complexes. Actin filaments are labeled in green. (See related article on page 10852.)