  We report on the results of the first-principle numerical study of
spontaneous breaking of chiral (sublattice) symmetry in suspended monolayer
graphene due to electrostatic interaction, which takes into account the
screening of Coulomb potential by electrons on $\sigma$-orbitals. In contrast
to the results of previous numerical simulations with unscreened potential, we
find that suspended graphene is in the conducting phase with unbroken chiral
symmetry. This finding is in agreement with recent experimental results by the
Manchester group \cite{Elias et al, 2011}. Further, by artificially increasing
the interaction strength we demonstrate that suspended graphene is quite close
to the phase transition associated with spontaneous chiral symmetry breaking,
which suggests that fluctuations of chirality and nonperturbative effects might
still be quite important.
