The local indie tastemakers at Radio Free Silverlake join the fight against Huntington's disease — a neurodegenerative disorder affecting tens of thousands of people globally —  with the Rock Against HD concert benefitting the Huntington's Disease Society of America. This year's edition is reminiscent of the best Let's Independent shows (perhaps because they share organizers and popular Boardner's alums), bringing out electro-tinged rockers Light FM, the elegantly creepy Fol Chen, and the psychedelically anthemic Radars to the Sky.