Richard Martinez is my hero. In the wake of the worst tragedy of his life, the murder of his only son, Martinez understands that his grief can spur change, and that he only has a brief window before our attention turns elsewhere. From the first time we saw him crash the Santa Barbara Sheriff's presser to call out the "craven politicians and the NRA" as being responsible for his son's death, to the numerous interviews in which he's spoken so eloquently, to yesterday's memorial at UCSB where he got tens of thousands in attendance to take to their feet to shout [...]