  We give a 1-dimensional family of classical and supersingular Enriques
surfaces in characteristic 2 covered by the supersingular K3 surface with Artin
invariant 1. Moreover we show that there exist 30 nonsingular rational curves
and ten non-effective (-2)-divisors on these Enriques surfaces whose reflection
group is of finite index in the orthogonal group of the Neron-Severi lattice
modulo torsion.
