  We investigate whether the dynamical status of clusters is related to the
large-scale structure of the Universe. We find that cluster substructure is
strongly correlated with the tendency of clusters to be aligned with their
nearest neighbour and in general with the nearby clusters that belong to the
same supercluster. Furthermore, dynamically young clusters are more clustered
than the overall cluster population. These are strong indications that clusters
develop in a hierarchical fashion by merging along the large-scale filamentary
structures within which they are embedded.
