  Two-photon events at the LHC are characterized by the protons scattered at
very small angles and the particles centrally produced via the photon-photon
fusion. To select these events from the huge samples of generic pp interactions
a detection of the scattered protons, or tagging two-photon interactions is
necessary. It requires installation of the high-resolution position-sensitive
detectors close to the proton beam and far from the interaction point.
Efficient measurement of the forward-scattered protons will open a new field of
studying high-energy photon-photon interactions at remarkable luminosity,
reaching 1% of that in pp collisions. In this paper a few aspects of tagging
two-photon interactions as well as several most exciting topics in the
high-energy two-photon physics at the LHC are presented.
