We propose to investigate the mid and far IR spectral energy
 distributions of powerful radio sources at intermediate and
 high redshifts. The goals of the program are to determine the
 luminosities and spectral energy distributions of radio loud
 quasars and radio galaxies. This will allow us to examine the
 evolution of dust in AGNs, the similarities and differences between
 radio galaxies and quasars, and the contribution of evolved stars to
 the near IR spectra of radio galaxies at z = 2.

 Our sample is a combination of a sub-set of the complete 3CR
 and high redshift radio galaxies and quasars from the MRC/1Jy
 survey. The sources have been selected for high ecliptic latitude
 and low cirrus brightness, i.e. so as to lie in the
 darkest regions of the FIR sky. This program will provide one
 of the best opportunities to explore the mid and FIR properties
 of radio sources over a wide range of redshifts.