High redshift radio galaxies: Beacons to biased hierarchical galaxy   formation within large scale structure
  We summarize observations of the properties of powerful radio galaxies and their environments from z = 0 to 5. These data show that some high redshift radio galaxies inhabit regions of gas and galaxy over-densities indicative of proto-cluster environments. 
C.L. Carilli (NRAO), G.K. Miley, H. Rottgering, J. Kurk, L.Pentericci   (Leiden), D.E. Harris (SAO), F. Bertoldi, K.M. Mente...