The microstructure of metallic foams can be analyzed three-dimensionally via the synchrotron-based X-ray microtomography. The 3D morphology of the cell wall of an Al-Zn-Mg foam has been revealed. The solid matrix is virtually removed in the right half of the figure, visualizing the spatial distribution of micro-pores inside the cell wall. For details see the article by Zhang et al. on page 149.