Cover photo: Fibrinogen-induced cytoskeleton organization and vitronectin receptor recruitment in human endothelial cells. Stress fibers appear green and the clusters of vitronectin receptor at focal adhesions appear yellow in this superposed double fluorescence photograph. Courtesy of E. Dejana et al. See the report "Fibrinogen Induces Endothelial Cell Adhesion and Spreading Via the Release of Endogenous Matrix Proteins and the Recruitment of More Than One Integrin Receptor," page 1509.