Cover picture: CARS image of a steroidogenic Y-1 cell, showing lipid droplets (LDs, red), overlaid on a two-photon fluorescence image of the same cell, showing mitochondria (green). The close packing of LDs and mitochondria may be related to Y-1 cells' ability to synthesize steroids, a process that requires physical contact between the two organelles. The CARS image was taken at a Raman shift of 2845 cm^-1. Images are 15 × 15 mm² in size. See the article by Nan et al. on page 728.