Cover picture: Photograph of the Drosophila neuromuscular junction highlighting the postsynaptic muscle (anti-myosin, blue), the membrane of the presynaptic motoneuron (anti-HRP, red), and clusters of glutamate receptors opposite each active zone (anti-DGluRIII, green). For details, see the article by Marrus et al. in this issue (pages 1406–1415).