Beyonce’and Jay-Z join Travon Martin’s mother Sybrina Fulton and Rev. Al Sharpton at the “Justice for Travon” vigil in New York, Saturday, July 20, 2013. (AP Photo/Noerdlinger Media. Rachel Noerdlinger) NEW YORK (AP) — Hundreds of demonstrators, including music superstars Jay-Z and Beyonce, joined Trayvon Martin’s mother Saturday in New York City at one of about 100 rallies around the country calling for justice for the slain Black teenager. Martin’s mother, Sybrina Fulton, and the Rev. Al Sharpton led the noontime “Justice for Trayvon” rally on a blazing hot plaza in downtown Manhattan, where some people swooned as the temperature topped 90 degrees.