Cover photograph: Electron tomography and computer graphic modeling of the Golgi complex and organelles around the Golgi. The Golgi cisternae are contiguous ladle-shaped (Left) and vertical (Right) channels (trans to cis; dark blue, green, red, pink, light blue). The endoplasmic reticulum (yellow), completely traverses the Golgi ribbon and intercalates between trans cisternae. Left, front view; Right, back view. To identify other surrounding organelles, see article by Marsh et al. on pages 2399-2406 in this issue.