* Hsin-Yu Chen (BHI): “Exciting News from Advanced LIGO-Virgo”

* Matt Nicholl, Phil Cowperthwaite, and Kate Alexander (CfA): special discussion on LIGO results.

* Avishai Dekel (JHU): “On the Origin of Ultra Diffuse Galaxies”

* Dan Hooper (Fermilab): TBD * Richard Bower (Durham University): "The Impact of Lambda"

* Lluis Mas (ITA, Oslo): "Diffuse Emission Halos as a Probe of Galaxy and Reionization Physics"