Cover photograph (Copyright © 2006, American Society for Microbiology. All Rights Reserved.): Transmission electron micrograph of Neisseria gonorrhoeae with a mutation in amiC. AmiC is an amidase that acts in cell separation following septation. Since N. gonorrhoeae divides in alternating planes, the reduced cell separation results in large aggregates of bacteria sharing a single, contorted cell wall (shown in red). False-coloring of the image was performed by Tom Pellet. (See related article in October 2006, vol. 188, issue 20, page 7211.)