Cover legend: An axonal growth cone of a cultured hippocampal neuron. Rab33a (green) participates in axon outgrowth by mediating anterograde axonal transport of post-Golgi vesicles and their concomitant fusion at the growth cones. Red, actin filaments; blue, microtubules. For more information, see the article by Nakazawa et al. (pages 12712–12725).