  Asymptotic symmetries at future null infinity (I+) of Minkowski space for
electrodynamics with massless charged fields, as well as non-Abelian gauge
theories with gauge group G, are considered at the semiclassical level. The
possibility of charge/color flux through I+ suggests the symmetry group is
infinite-dimensional. It is conjectured that the symmetries include a G
Kac-Moody symmetry whose generators are "large" gauge transformations which
approach locally holomorphic functions on the conformal two-sphere at I+ and
are invariant under null translations. The Kac-Moody currents are constructed
from the gauge field at the future boundary of I+. The current Ward identities
include Weinberg's soft photon theorem and its colored extension.
