The image “Staring Down the Barrel of a Gun,” created by Dr. Martin Cheung (University of Bristol), who used electron microscopy to reconstruct the tip of a molecular syringe that many pathogenic bacteria use to cause disease. This image shared 1st Prize at University of Bristol's annual 2013 Art of Science Competition and has been deposited with Wellcome Images ( http://wellcomeimages.org/ ), a collection of over 40,000 biomedical images. For details, see the article by Cheung et al . on pp. 31–50 of this issue