Written by Nathan Mitchell/ El Independiente ... NATHAN MITCHELL Isabel Garcia, the leader of Derechos Humanos, protests against SB 1070 at Raul Grijalva's headquarters ... With the global spotlight on Arizona's new immigration law, South Tucson has begun preparations to enforce the aggressive and contentious "Support Our Law Enforcement and Safe Neighborhoods Act," better known as SB 1070 ... The new legislation, which Gov. Jan Brewer signed into law April 23, makes it a crime to be in Arizona