We consider the exact controllability and stabilization of Maxwellequation by using results on the propagation of singularities of theelectromagnetic field. We will assume geometrical control condition and usetechniques of the work of Bardos et al. on the waveequation. The problem of internal stabilization will be treated with moreattention because the condition divE=0 is not preserved by the system ofMaxwell with Ohm's law.