  This is a review of selected topics from recent work on symmetry charges in
asymptotically flat spacetime done by the author in collaboration with U. Kol
and R. Javadinezhad. First we reinterpret the reality constraint on the
boundary graviton as the gauge fixing of a new local symmetry, called dual
supertranslations. This symmetry extends the BMS group and bears many
similarities to the dual (magnetic) gauge symmetry of electrodynamics. We use
this new gauge symmetry to propose a new description of the TAUB-NUT space that
does not contain closed time-like curves. Next we summarize progress towards
the definition of Lorentz and super-Lorentz charges that commute with
supertranslations and with the soft graviton mode.
