Resilience is a quality that is greatly underrated in successful cities. Our guests this week are making their own special contributions to understanding how to make cities resilient.

Sadhu Johnston is leading what may be the nation's best known municipal green program. Sadhu is the Commissioner of the City of Chicago Department of Environment where he manages a whole host of programs intended to restore and protect Chicago's natural resources. Prior to working for the City of Chicago, Sadhu served as the Executive Director of the Cleveland Green Building Coalition.

Also with us is Brett Parson, winner of the Harvard Innovations in Government Award, about his success in breaking the barriers between the police and the gay community in Washington, D.C. Brett heads the DC police Gay and Lesbian Liaison Unit.

All this and more on this week's Smart City.