Cover legend: Confocal image of three mouse neuromuscular junctions, with axons highlighted in white, Schwann cells labeled in green, and postsynaptic membranes on muscle fibers labeled in red. The neuromuscular synapses are in different stages of synapse elimination, so that retraction bulbs (axosomes) can be found near synaptic sites. For more information, see the article by Song et al. in this issue (pages 8993–9001).