Visual artist Rafael Lozano-Hemmer will illuminate the night sky with 24 search lights over the Benjamin Franklin Parkway in Philadelphia from Thursday, September 20 through Sunday, October 14. The interactive lights will not be controlled by the artist, but rather controlled through crowdsourced voice messages of people around the world. Watch as Lozano-Hemmer explains his vision for Open Air Philly. Also featured are performances by beatboxer Rahzel and Philly Youth Poet Jamarr Hall. (Video produced by Lindsay Lazarski/WHYY)